ETC Unison AX Series User manual

Part Number: 7183M2110 Rev: B
Released: 2019-08
Unison
Auxiliary Enclosure Series
Installation Manual

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ETC intends this document, whether printed or electronic, to be provided in its entirety.

Table of Contents i
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warnings and Notice Conventions . . . . . . . . . . . . . . . .1
Help from ETC Technical Services . . . . . . . . . . . . . . . . .2
Unison Auxiliary Enclosure. . . . . . . . . . . . . . . . . . . . . . .3
AX Series Enclosure Options . . . . . . . . . . . . . . . . . . . . . . . . . . .3
AX12X Series Enclosure Options . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 1 Prepare for Installation . . . . . . . . . . . . . . . . 4
Unpack and Inspect . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Main Circuit Breaker Protection . . . . . . . . . . . . . . . . . .4
Using 90°C Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Maximum Current Draw of Enclosures . . . . . . . . . . . . .5
Short Circuit Current Rating (SCCR). . . . . . . . . . . . . . . .5
Where to Install the Enclosure. . . . . . . . . . . . . . . . . . . .6
Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Enclosure Dimensions and Weights. . . . . . . . . . . . . . . . . . . . . .6
Installation Environment Requirements . . . . . . . . . . . . . . . . . .7
Wire Routing and Specification. . . . . . . . . . . . . . . . . . . . . . . . .7
Chapter 2 Install Enclosures . . . . . . . . . . . . . . . . . . . . . 9
Mounting Auxiliary and DRd Enclosures Together . . .9
Chapter 3 Rough-in Conduit and Wiring . . . . . . . . . 11
Rough-in Line Conduit to the Auxiliary Enclosure . . .12
Chapter 4 Connect Line Power. . . . . . . . . . . . . . . . . .13
Route and Connect Interconnect Cables to Adjacent
DRd Enclosure(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

ii Unison Enclosure Installation
Chapter 5 Final Installation and Power Up . . . . . . . . 17
Check Main Power Wiring . . . . . . . . . . . . . . . . . . . . . .17
Sealing Enclosure Air Leaks . . . . . . . . . . . . . . . . . . . . .17
Appendix A Dual DRd12 with Cross-Bussed ACP . . . . . 18
Data Interconnect Cable . . . . . . . . . . . . . . . . . . . . . . .18
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Introduction 1
Introduction
Welcome to the installation manual for Unison AX series auxiliary enclosures. This manual
contains the procedures for safe and efficient installation of an AX main breaker auxiliary
enclosure or AX main lug auxiliary enclosure, and the cross-bussed AX12X auxiliary enclosure.
Warnings and Notice Conventions
These symbols are used in ETC documentation to alert you to danger or important
information:
AX Series Auxiliary Enclosures
Series Voltage Notes
AX6-MCB-1-150 100–120 VAC 150 A main breaker enclosure for DRd6 – 1Ø, 3-wire
AX6-MCB-3-100 100–277 VAC 100 A main breaker enclosure for DRd6 – 3Ø, 4-wire
AX12-MCB-1-300 100–120 VAC 300 A main breaker enclosure for DRd12 – 1Ø, 3-wire
AX12-MCB-3-200 100–277 VAC 200 A main breaker enclosure for DRd12 – 3Ø, 4-wire
AX12X Series Cross-bussed Auxiliary Enclosures
Series Voltage Notes
AX12X-MCB-1-400 100–120 VAC 400 A main breaker for (2) DRd12 – 1Ø, 3-wire
AX12X-MCB-3-400 100–277 VAC 400 A main breaker for (2) DRd12 – 3Ø, 4-wire
AX12X-ML-1-600 100–120 VAC Main Lug with cross-bussing for (2) DRd12 enclosures – 1Ø,
3-wire (600 A maximum main feed)
AX12X-ML-3-400 100–277 VAC Main lug with cross-bussing for (2) DRd12 enclosures – 3Ø,
4-wire (400 A maximum main feed)
Note:
Notes are helpful hints and information that is supplemental to the main text.
CAUTION:
A Caution statement indicates situations where there may be undefined or
unwanted consequences of an action, potential for data loss or an equipment
problem.
WARNING: A Warning statement indicates situations where damage may occur, people
may be harmed, or there are serious or dangerous consequences of an action.
WARNING: RISK OF ELECTRIC SHOCK! This warning statement indicates situations where
there is a risk of electric shock.

2Unison Enclosure Installation
Help from ETC Technical Services
If you are having difficulties and your problem is not addressed by this document, try the ETC
support website at support.etcconnect.com or the main ETC website at etcconnect.com. If
none of these resources are sufficient, contact ETC Technical Services directly at one of the
offices identified below. Emergency service is available from all ETC offices outside of regular
business hours.
When calling for help, please have the following information handy:
• Your location and job name.
• A complete list of ETC equipment.
• A complete list of other installed products and components connected to the system you are
troubleshooting.
• DMX control source, if any.
Please email comments about this manual to: [email protected].
Americas United Kingdom
ETC, Inc. ETC Ltd - UK
Technical Services Department Technical Services Department
3031 Pleasant View Road 26-28 Victoria Industrial Estate
Middleton, WI 53562 Victoria Road,
800-775-4382 (USA, toll-free) London W3 6UU England
[phone] [phone]
[email protected] te[email protected]
Asia Germany
ETC Asia ETC GmbH
Technical Services Department Technical Services Department
Room 1801, 18/F Ohmstrasse 3
Tower 1, Phase 1 Enterprise Square 83607 Holzkirchen, Germany
9 Sheung Yuet Road [phone]
Kowloon Bay, Kowloon, Hong Kong [email protected]
[phone]
[email protected]
France
ETC France
62-64 rue Danielle
Casanova
Saint-Denis Cedex
F93200
[phone]
[email protected]

Introduction 3
Unison Auxiliary Enclosure
A main circuit breaker auxiliary enclosure is equipped with breakers that are sized for
maximum load capacity for the DRd configuration.
AX Series Enclosure Options
Unison AX series enclosures are designed to provide main lug or main circuit breaker input
feed provisions for single DRd6 or DRd12 applications.
• AX6-MCB-1-150 – includes main breaker for DRd6, 150 A/1Ø, 3-wire
• AX6-MCB-3-100 – includes main breaker for DRd6, 100 A/3Ø, 4-wire
• AX12-MCB-1-300 – includes main breaker for DRd12, 300 A/1Ø, 3-wire
• AX12-MCB-3-200 – includes main breaker for DRd12, 200 A/3Ø, 4-wire
AX12X Series Enclosure Options
Unison AX12X cross-bussing enclosures are designed to provide main lug or main breaker
input feed termination for cross-bussed DRd12 applications.
• AX12X-ML-1-600 – includes cross-bussed main lugs for (2) DRd12, 600 A/1Ø, 3-wire
• AX12X-ML-3-400 – includes cross-bussed main lugs for (2) DRd12, 400 A/3Ø, 4-wire
• AX12X-MCB-1-400 – includes main breaker for (2) DRd12, 400 A/1Ø, 3-wire
• AX12X-MCB-3-400 – includes main breaker for (2) DRd12, 400 A/3Ø, 4-wire
Note:
A 600A single-phase main circuit breaker is not available due to NEC wire bending
space limitations.
Main LugMain Circuit
Breaker

4Unison Enclosure Installation
Chapter 1
Prepare for Installation
Unpack and Inspect
Before you begin installation, check your shipment and confirm it arrived complete and undamaged.
1: Check the shipping container for physical damage.
2: If you find damage, document it to help with a claim against your shipper.
3: Unpack your order and check the contents against the packing list to be sure your order is
complete.
4: If you discover a problem, contact the ETC Systems Group. See
Help from ETC Technical Services
on
page 2 .
Main Circuit Breaker Protection
Before you begin installing the Unison auxiliary enclosure, make sure you have installed a main circuit
breaker cabinet or other readily accessible input power disconnect device. In certain bussed and cross-
bussed systems, this disconnect device may be the Unison AX series auxiliary enclosure with a main
circuit breaker.
Using 90°C Wire
The AX enclosures are listed for both copper and aluminum feed wiring. If using aluminum, take note
of the minimum specified bend radii from the National Electrical Code (NEC).
Bus cabling to DRd enclosures must use the included copper cable to satisfy the requirement that the
DRd is fed by copper wire only and to meet UL bend radius limitations.
Wiring for all terminations in the AX and DRd cabinets should be sized per the 75°C ampacity column
in the NEC.
WARNING: RISK OF ELECTRIC SHOCK! Auxiliary enclosures installed without an accessible
power disconnect device cannot be serviced or operated safely. Follow all
local codes and restrictions.
WARNING: RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the panel before
working inside could result in serious injury or death.
De-energize main feed to the dimmer rack and follow appropriate Lockout/
Tagout procedures as mandated by NFPA 70E. It is important to note that
electrical equipment such as dimmer racks can present an arc flash hazard if
improperly serviced. This is due to the high amounts of short-circuit current
available on the electrical supply to this equipment. Any work must comply
with OSHA Safe Working Practices.
Note:
The terminals may be marked AL9CU indicating a 90°C rating; this is the lug
manufacturer’s rating, not the tested UL listing for the AX enclosure.

Prepare for Installation 5
Maximum Current Draw of Enclosures
Short Circuit Current Rating (SCCR)
†Ratings are for three-phase systems.
Enclosure
Type Phase Type
120/277 V
Maximum Current
Draw
240 V Maximum
Current Draw
AX6 Single-phase (1Ø) 120 A –
Three-phase (3Ø) 80 A 60 A
AX12 Single-phase (1Ø) 240 A –
Three-phase (3Ø) 160 A 120 A
AX12X Single-phase (1Ø) 480 A –
Three-phase (3Ø) 320 A 240 A
Enclosure Configuration
SCCR at
100-120
VAC†
SCCR at
240-277
VAC†
DRd6 with AX6 main circuit breaker enclosure 100,000 A 65,000 A
DRd12 with AX12X (cross-bussed) main lug enclosure 22,000 A 22,000 A
DRd12 with AX12 main circuit breaker enclosure 100,000 A 65,000 A
DRd12 with AX12X main circuit breaker enclosure 100,000 A 65,000 A

6Unison Enclosure Installation
Where to Install the Enclosure
Unison auxiliary enclosures are designed to be surface mounted on load bearing walls in an electrical
closet or a room with restricted public access. It is recommended that you install the enclosure at least
914.4 mm (36 in) off the floor surface.
Clearance Requirements
Enclosure Dimensions and Weights
*All weights are approximate.
Note:
Additional Unison DRd and auxiliary enclosures of the same size are the exception to
the 152 mm (6 in) hinge side clearance rule. Unison enclosures are designed for side
by side use without issue.
Enclosure
Type Height Width Depth Product Weight*
Shipping
Weight*
AX6 MCB
enclosure
551 mm
(21-11/16 in)
330 mm
(13 in)
203 mm
(8 in)
12.5 kg
(27 lb 10 oz)
16 kg
(35 lb)
AX12 MCB
enclosure
787 mm
(31 in) 15 kg ( 33 lb) 20 kg (40 lb)
AX12X ML
enclosure
787 mm
(31 in) 12.7 kg (28 lb) 16 kg (35 lb)
AX12X MCB
enclosure
787 mm
(31 in) 15 kg (33 lb) 20 kg (40 lb)
12”
(305 mm)
6”
(152 mm)
17”
(432 mm)
36”
(914.4 mm)
Unison DRd enclosures require 305 mm (12 in) top clearance for proper
airflow through the cabinet. For sufficient door clearance, install the DRd
enclosure with at least 432 mm (17 in) of front clearance and
152 mm (6 in) of clearance to the left of the door hinge from walls or
other equipment.

Prepare for Installation 7
Installation Environment Requirements
• For your safety, you should install a main circuit breaker cabinet or other readily accessible input
power disconnect device in the same area as the Unison auxiliary enclosure. For bussed enclosure
installations, this device may be the auxiliary enclosure. Main breakers not in the same room must
have a physical means to be locked off.
• A clean (not dusty) temperature-controlled environment with an ambient temperature of
0 to 40°C (32 to 104°F) and ambient humidity of 10 to 90%, non-condensing.
• Restricted public access to prevent tampering.
• Soundproofing or performance area separation to muffle ventilation fan noise.
Wire Routing and Specification
Unison AX series enclosures have conduit knockouts on both sides of the cabinet for feed through to
the adjacent DRd enclosure(s). The top and bottom are intentionally left blank to allow holes to be
punched to match the incoming conduit.
WARNING: RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the panel before
working inside could result in serious injury or death.
De-energize main feed to the dimmer rack and follow appropriate Lockout/
Tagout procedures as mandated by NFPA 70E. It is important to note that
electrical equipment such as dimmer racks can present an arc flash hazard if
improperly serviced. This is due to the high amounts of short-circuit current
available on the electrical supply to this equipment. Any work must comply
with OSHA Safe Working Practices.
CAUTION:
HVAC systems must at all times maintain the specified ambient temperature
at the enclosure. Unison systems operating within 5°C (10°F) of the upper or
lower temperature limits must strictly follow installation and operation
guidelines to operate reliably.
CAUTION:
Do not route line (input feed) wires through the back panel. Doing so
requires bend radii that place undue stress on the input lugs, may damage
insulation, and will violate the UL listing of this enclosure.
CAUTION:
Line (feed) lugs for the Unison AX enclosures are UL/cUL listed for use with
both copper and aluminum wire.
Wiring from the AX rack to the DRd enclosures must use the included
extra-flexible copper wire.
Load side termination are suitable for copper wire only.
0°
10°
20°
30°
40°
50°
60°
70°
80°
90°
100°
-18°
-10°
0°
10°
20°
30°
40°

8Unison Enclosure Installation
AX and AX12X Auxiliary Enclosure
It is required that line feed enters from the top or bottom panels of the enclosure. The side knockouts
are provided for cross-bussing and data interconnect feed through to the adjacent DRd dimming
enclosure(s). The corresponding number of chase nipples with integral bushings are included.
Wire Access
Location
Wire
Feed wire Interconnect wiring to
DRd enclosure
Top of enclosure Acceptable Not recommended
Bottom of
enclosure Preferred Not recommended
Left side Not recommended Preferred
Right side Not recommended Preferred

Install Enclosures 9
Chapter 2
Install Enclosures
Mounting Auxiliary and DRd Enclosures Together
One DRd may be bussed to the AX series auxiliary enclosure, which contains a main circuit breaker
(MCB) for power distribution to the adjacent DRd enclosure.
Two DRd12 enclosures may be cross-bussed to an AX12X which is designed to provide main lug or
main breaker input feed termination to the adjacent DRd12 enclosures.
The wall must be strong enough to hold all enclosures fully populated with modules, conduit and wire.
See
Where to Install the Enclosure on page 6 for weight, dimension and clearance requirements.
1: Determine where your enclosures will be installed using the weight and dimension requirements
detailed in
Where to Install the Enclosure on page 6 .
2: Use the measured slot dimensions located in the graphic below to mark the hole locations for the
mounting hardware.
3: Drill the holes and install the mounting hardware for each enclosure.
• Four 8 mm (3/8 in) bolts or screws 50–100 mm (2–4 in) long, and suitable wall plugs are
suggested mounting hardware (lag bolts recommended).
• Both the surface and the mounting hardware must support the weight of the enclosure unit
fully populated with modules.
• Expose at least 25 mm (1 in) of threads for mounting.
Note:
The AX series enclosure is best installed to the left of the DRd in main lug and main
breaker applications and must be installed between two DRd12 enclosures in a cross-
bussed application.
AX6 / DR6 - 16.3”
AX12 / DR12 - 19.9”
16” 11”
AX6 / DR6 - 5.7”
AX12 / DR12 - 7.7”
22”
AX6 / DR6 - 21.9”
AX12 / DR12 - 31”
10.7”
6.3”
AX6 / DR6 - 10.6”
AX12 / DR12 - 7.7”
17” 17”13”
DRd DRdAX

10 Unison Enclosure Install
4: Remove the knockouts from the side conduit plug on the DRd and auxiliary enclosure before
installation. Only remove the knockouts that are adjacent to another enclosure.
5: Install the DRd first, following the instructions as outlined in the DRd Enclosure Installation
Manual.
6: Align the auxiliary enclosure against the left side of the DRd enclosure and mount it to the
previously installed mounting hardware. Notice, with conduit holes mated the bolt spacings are
on 16" centers (top left DRd and top left AX enclosure) for installation convenience.
7: For cross-bussed DRd12 enclosure installations, install the second DRd12 by following steps 4
through 6 above.
8: Check that each enclosure is level and plumb then tighten the mounting hardware for a secure
installation.

Rough-in Conduit and Wiring 11
Chapter 3
Rough-in Conduit and Wiring
See Wire Routing and Specification on page 7 . Line or (input feed) wires for standard AX series
enclosures should enter through the top or bottom.
All terminations are accessible from the front of the enclosure.
DRd enclosure with AX enclosure
Two DRd12 enclosures with AX12X enclosure

12 Unison Enclosure Install
Rough-in Line Conduit to the Auxiliary Enclosure
Line input wires in main lug, main breaker, or cross-bussed DRd enclosure applications terminate first
in the Auxiliary enclosure and then are fed through the side conduit knockouts to the adjoining DRd
enclosure(s).
The line feed-through (interconnect) cables for phase, neutral and ground lugs in the auxiliary
enclosure are connected for you at the factory. Your enclosure is supplied with one or two sets of
interconnect cables depending on the model ordered.
1: Plan wire entry in to the enclosure. See
Wire Routing and Specification on page 7 .
2: Remove the side conduit knockout from adjoining side of the auxiliary enclosure and the DRd
enclosure. When installing in a cross-bussed application, remove both side knockouts.
3: Install the ETC supplied nylon insulated chase nipple to the knockouts between the auxiliary and
DRd enclosure(s).
4: Remove the auxiliary enclosure front cover, and if necessary, the top or bottom front trim covers
for complete access to the lugs.
5: Punch conduit holes, top or bottom, as required by the wire entry plan.
6: Install conduit fittings or insert fish paper lining material into the opening.
7: Be sure there are minimal air gaps. See
Sealing Enclosure Air Leaks on page 17 .
Main Lug Support Panel Breaker Position
The unit ships with the support panel in the top feed position (shifted to the bottom of the AX). These
positions are to comply with UL and NEC wire bending space requirements.
1: If you are bottom feeding the AX, loosen the 4 nuts from the sides of the enclosure.
2: Reposition the support panel with the breaker on the main lugs to the top position.
3: Tighten the nuts.
CAUTION:
Wire openings must have fittings, grommets or fish paper lining material to
protect wire and cable insulation from damage by sharp metal edges and to
prevent air leaks.
When using the 400 A breaker frame you must replace the plastic lug covers
for compliance and safe operation.
Line input may enter the auxiliary enclosure from the top
or bottom.
The ETC supplied line feed interconnect cables will feed
through the side conduit knockouts to the adjacent DRd.
See
Route and Connect Interconnect Cables to Adjacent
DRd Enclosure(s)
on page 16 for interconnect cable
termination instructions.

Connect Line Power 13
Chapter 4
Connect Line Power
Line input wires in main breaker or cross-bussed DRd applications terminate in the Auxiliary enclosure.
Interconnect cables are fed through the side conduit knockouts of the auxiliary enclosure and connect
to the adjacent DRd enclosure(s).
Main Breaker power input options include:
• AX6-MCB-1-150 – 1Ø, 3-wire, 150 A
• AX6-MCB-3-100 – 3Ø, 4-wire, 100 A
• AX12-MCB-1-300– 1Ø, 3-wire, 300 A
• AX12-MCB-3-200 – 3Ø, 4-wire, 200 A
• AX12X-MCB-1-400 - 1Ø, 4 wire, 400 A (use with 2 DRd12 cross-bussed enclosures)
• AX12X-MCB-3-400 – 3Ø, 4-wire, 400 A (use with 2 DRd12 cross-bussed enclosures)
Main Lug power input options include:
• AX12X-ML-1-600 – 1Ø, 3-wire, 600 A Main lugs (use with 2 DRd12 cross-bussed enclosures)
• AX12X-ML-3-400 – 3Ø, 4-wire, 400 A Main lugs (use with 2 DRd12 cross-bussed enclosures)
WARNING: RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the panel before
working inside could result in serious injury or death.
De-energize main feed to the dimmer rack and follow appropriate Lockout/
Tagout procedures as mandated by NFPA 70E. It is important to note that
electrical equipment such as dimmer racks can present an arc flash hazard if
improperly serviced. This is due to the high amounts of short-circuit current
available on the electrical supply to this equipment. Any work must comply
with OSHA Safe Working Practices.
WARNING: RISK OF ELECTRIC SHOCK! Auxiliary enclosures installed without an accessible
power disconnect device cannot be serviced or operated safely. All enclosure
terminations must be done with the power off. In some instances, this device
may be an auxiliary enclosure with a main circuit breaker. Follow all local
codes and restrictions.
CAUTION:
Load wires used with ETC dimming systems must be copper. Do not use wire
containing aluminum. Line wires for the AX enclosures can be aluminum or
copper.

14 Unison Enclosure Install
1: Pull the line phase, neutral, and ground cables to the enclosure through the conduit openings
previously prepared.
2: Strip one inch of insulation from the end of each cable and terminate them to the lugs. Line
connections are labeled L1, L2, L3 (for three-phase) and N. The equipment grounding lug is
labeled with the universal grounding symbol for easy identification.
3: Tighten the lugs to the correct torque based on cable size. Refer to the following table.
Phase lugs
Neutral lugs
Ground lugs
Neutral lugs
Phase lugs
Ground lugs
Main Lug
Main Circuit Breaker

Connect Line Power 15
AX Enclosure Wire Lug Wire Range Wire Size for Torque Lug Wire
Torque
Hex Key
Size
3-phase
AX6-MCB and
AX12-MCB
Phase Single 10 to 150 mm2
(8 AWG to 350 kcmil)
Single 25 to 35 mm2
(3 to 1 AWG )
17 Nm
(150 in-lb) 5/16”
50 to 185 mm2
(1/0 AWG to 350 kcmil)
31 Nm
(275 in-lb)
Neutral Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
Dual 25 to 240mm2
(4 AWG to 500 kcmil)
42.3 Nm
(375 in-lb) 3/8”
Ground Single 10 to 50 mm2
(6 to 2/0 AWG)
Single 30 to 50 mm2
(3 to 2/0 AWG)
5.65 Nm
(50 in-lb) 3/16”
Single 10 to 25 mm2
6 to 4 AWG
5.1 Nm
(45 in-lb)
3-phase
AX12X-MCB
Phase Single 10 to 150 mm2
(8 AWG to 350 kcmil)
Single 25 to 35 mm2
(3 to 1 AWG )
17 Nm
(150 in-lb) 5/16”
50 to 185 mm2
(1/0 AWG to 350 kcmil)
31 Nm
(275 in-lb)
Neutral Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
Dual 25 to 240mm2
(4 AWG to 500 kcmil)
42.3 Nm
(375 in-lb) 3/8”
Ground Single 50 to 150 mm2
(1 AWG to 350 kcmil)
Single 50 to 150 mm2
(1 AWG to 350 kcmil)
42.3 Nm
(375 in-lb) 3/8”
1-phase
AX6-MCB
Phase
Dual 70 - 185 mm2
(2/0 AWG to 400 kcmil)
or
Single 50 to 300 mm2
(1 AWG to 600 kcmil)
Dual 70 to 185 mm2
(2/0 AWG to 400 kcmil)
or
Single 50 to 300 mm2
(1 AWG to 600 kcmil)
42.3 Nm
(375 in-lb) 5/16”
Neutral Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
Dual 25 to 240mm2
(4 AWG to 500 kcmil)
42.3 Nm
(375 in-lb) 3/8”
Ground Single 10 to 50 mm2
(6 to 2/0 AWG)
Single 30 to 50 mm2
(3 to 2/0 AWG)
22.6 Nm
(200 in-lb) 3/16”
1-phase
AX12-MCB and
AX12X-MCB
Phase
Dual 70 - 185 mm2
(2/0 AWG to 400 kcmil)
or
Single 50 to 300 mm2
(1 AWG to 600 kcmil)
Dual 70 to 185 mm2
(2/0 AWG to 400 kcmil)
or
Single 50 to 300 mm2
(1 AWG to 600 kcmil)
42.3 Nm
(375 in-lb) 5/16”
Neutral Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
42.3 Nm
(375 in-lb) 3/8”
Ground Single 50 to 150 mm2
(1 AWG to 350 kcmil)
Single 50 to 150 mm2
(1 AWG to 350 kcmil)
42.3 Nm
(375 in-lb) 3/8”
AX12X ML
Phase Dual 25 to 240 mm2
(4 AWG to 500 kcmil)
Dual 25 to 240mm2
(4 AWG to 500 kcmil)
42.3 Nm
(375 in-lb) 3/8”
Neutral
Ground Single 10 to 50 mm2
(6 to 2/0 AWG)
Single 30 to 50 mm2
(3 to 2/0 AWG)
22.6 Nm
(200 in-lb) 3/16”
Single 10 to 25 mm2
(6 to 4 AWG)
42.3 Nm
(375 in-lb)

16 Unison Enclosure Install
Route and Connect Interconnect Cables to Adjacent DRd Enclosure(s)
ETC has supplied extra-flexible wire for phase, neutral, and ground lugs from the auxiliary enclosure to
the DRd enclosure(s). Once your auxiliary and DRd enclosures are installed, feed the load wires through
the side chase nipples to the adjacent DRd enclosure phase, neutral, and ground lugs. Your AX6,
AX12, or AX12X will be supplied with one or two sets of cables, depending on the model ordered.
1: Route the ETC supplied interconnect cabling through the conduit knockouts on either side of
the auxiliary enclosure to the adjacent DRd enclosure(s).
.
2: Pull each cable to the appropriate lug. It is necessary to cut the cable to the pre-marked length
in DRd6 applications
3: Attach each cable to its appropriate phase, neutral and ground lugs inside the DRd enclosure
using the supplied copper foil to avoid damaging the fine stranding of the extra-flexible wire.
4: Tighten the lugs to the correct torque based on cable size. Refer to the table on the previous
page.
5: Fill empty spaces of the conduit openings with UL/CE approved filler.
Note:
Tie wrap the interconnect cables to the back wall of the DRd immediately after they
are pulled through the conduit fitting. This prevents the cables from unnecessarily
restricting the air flow to the fan.
Note:
When you order a single phase auxiliary enclosure from the factory, the interconnect
cables will be installed in a single-phase configuration. See the
DRd Enclosure
Installation Manual
for instructions to configuring the DRd enclosure bus for single-
phase operation.
CAUTION:
Failure to use the proper torque when tightening the set screws can cause
premature failure of the equipment.
CAUTION:
Air leaks can cause DRd enclosures to shut down due to insufficient air flow.
See Sealing Enclosure Air Leaks on page 17.