OBO Bettermann MKS 310 FS User manual

OBO Bettermann Holding GmbH & Co. KG
Mounting
instructions
Screw-on cable tray systems

© 2021 OBO Bettermann Holding GmbH & Co. KG
Screw-on cable tray systems
Mounting instructions

3 | EN
Screw-on cable tray systems
Table of contents
Table of contents
1 About these instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Target group ....................................................5
1.2 Relevance of these instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3 Types of warning information ........................................5
1.4 Depiction conventions .............................................5
1.5 Basic standards and regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.6 Applicable documents .............................................6
2 Correct use ...............................................6
3 Safety ...................................................6
3.1 General safety information ..........................................6
3.2 Personal protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.3 Personal tools ...................................................7
4 System overview ..........................................8
4.1 System description ...............................................8
4.1.1 Cable trays ............................................................ 8
4.1.2 Connectors ............................................................ 9
4.1.3 Fittings .............................................................. 10
4.1.4 Cover for cable trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.5 Cover for fittings ....................................................... 18
4.1.6 Accessories .......................................................... 19
5 Mounting ................................................20
5.1 Cutting the cable tray .............................................21
5.2 Mounting the joint plate ...........................................22
5.3 Applying the edge protection strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.4 Connecting cable trays ...........................................23
5.4.1 Creating a straight connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4.2 Creating an angled connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4.3 Creating a vertical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.5 Mounting fittings ................................................35
5.5.1 Supporting a fitting ..................................................... 35
5.5.2 Mounting WKV angle connections on a fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.5.3 Mounting the 45°/90° bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.5.4 Mounting a falling/rising vertical bend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.5.5 Mounting an add-on tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.5.6 Mounting the T branch piece . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.5.7 Mounting a cross-over . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.5.8 Mounting adjustable bend elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.5.9 Mounting a reducer profile/end closure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.6 Mounting barrier strips ............................................56
5.7 Creating equipotential bonding .....................................56
5.8 Mounting the cover ..............................................57
5.8.1 Mounting the cover with cover clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.8.2 Mounting the cover with turn buckle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.8.3 Mounting a fitting cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4 | EN OBO Bettermann
Table of contents
6 Maintaining the system ....................................61
7 Dismantling the system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8 Disposing of the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9 Technical data ...........................................62

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Screw-on cable tray systems
About these instructions
1 About these instructions
1.1 Target group
These mounting instructions are intended for the following target group:
– Engineers and architects charged with the planning of cable support
systems with cable trays.
– Electrically trained specialists charged with installing cable support
systems and cable trays.
1.2 Relevance of these instructions
These instructions are based on the standards valid at the time of
compil ation (June 2021).
Please read the instructions carefully before starting mounting. We will
not accept any warranty claims for damage caused through non-obser-
vance of these instructions.
Any images are intended merely as examples. Mounting results may look
different.
In these instructions, cables and lines are referred to simply as cables.
1.3 Types of warning information
Type of risk!
Shows a risky situation. If the safety instruction is not observed, then
serious or fatal injuries may occur.
Type of risk!
Shows a risky situation. If the safety instruction is not observed, then
medium or minor injuries may occur.
Type of risk!
Shows a hazardous situation. If the safety instruction is not observed,
then damage to the product or the surroundings may occur.
Note! Indicates important information or assistance.
1.4 Depiction conventions
Correct design
Incorrect design
WARNING
CAUTION
ATTENTION

6 | EN OBO Bettermann
Correct use
1.5 Basic standards and regulations
The screw-on cable tray systems fulfil the requirements of “IEC
61537:2006 – Cable management ‒ Cable tray systems and cable ladder
systems” for the low voltage area.
1.6 Applicable documents
– Declaration of conformity, see
https://www.obo.global/service/downloads/declarations-of-conformity/
cable-support-systems/
– Mounting instructions for different support structures:
• U support systems, see
www.obo.de/out/media/04-150_MA_U_support_systems.pdf
• I support systems, see
www.obo.de/out/media/04-150_MA_I_support_systems.pdf
• Universal systems, see
www.obo.de/out/media/04-150_MA_Universal_systems.pdf
• Trapezoidal systems, see
www.obo.de/out/media/04-150_MA_TP_support_systems.pdf
• Clamp fastenings, see
www.obo.de/out/media/04-150_MA_Clamp_fastening_systems.pdf
2 Correct use
The screw-on cable tray systems are used to support and route all kinds
of cables, taking the approved load values into account. Depending on
the corrosion protection used, they can be mounted both indoors and
outdoors.
The cable tray systems are suitable for use at ambient temperatures
of ‒20 °C to +120 °C. At temperatures below ‒20 °C, the material will
become brittle and may not be processed further.
The screw-on cable tray systems are not designed for any other purpose
than the one described here. If the screw-on cable tray systems are used
for another purpose, any liability, warranty or damage claims shall be
rendered null and void.
3 Safety
3.1 General safety information
Observe the following general safety information:
– Only have electrical work carried out by specialist personnel with elec-
trical training.
– Risk of cutting from plate edges. Wear protective gloves.
– Design the screw-on cable tray systems according to the loads to be
expected.

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Screw-on cable tray systems
Safety
3.2 Personal protective equipment
List of personal protective equipment to be used:
Use hand protection
Wear eye protection
3.3 Personal tools
List of required tools:
– Angle grinder
– Drill/battery-operated screwdriver
– Torque spanner
– Screwdriver
– Hammer

8 | EN OBO Bettermann
System overview
4 System overview
4.1 System description
The screw-on cable trays for routing cables are designed for high sup-
port loads. The widths vary between 100 and 600 mm and the side
heights between 35 and 110 mm. The cable trays are screwed together
using connector holes with the appropriate fastening material. The selec-
tion of the matching cable tray system is dependent on the area of use
and the cable load and volume to be routed.
The following screw-on cable tray systems are available with hot gal-
vanised (FS) and hot-dip galvanised (FT) and stainless steel (A2/A4)
surfaces:
– MKS medium-duty cable tray system
– SKS heavy-duty cable tray system
– DKS perforated cable tray system
– EKS extra-heavy-duty cable tray system
– IKS industrial cable tray system
The screw-on cable trays are available in perforated and unperforated
versions. The systems include countless connectors, fittings, such as
bends, branches, tees and reducers, cross-overs, as well as covers and
other accessories.
The cable tray systems can be mounted on floors, walls and ceilings
on various support systems. The mounting of the support systems is
described in separate mounting instructions, see “1.6 Applicable docu-
ments” on page 6.
4.1.1 Cable trays
Fig. 1:
12
4
5
3
Unperforated and perforated tray
1
Unperforated cable tray (MKSU, SKSU)
2Perforated cable tray (MKS, SKS, DKS, EKS, IKS)

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Screw-on cable tray systems
System overview
3
Cable tray rail with rounded rail edge
4
Cable tray base
5Connector perforation
4.1.2 Connectors
The following parts can be interconnected using connectors:
– Cable tray with cable tray
– Cable tray with fitting
2 3 4 5
1
67
Fig. 2: Connector
No. Designation /type Function Application
1
RV straight connector set
with joint plate for MKS/
SKS
Screwless straight connec-
tion
Cable tray
height 35 and
60 mm
2RWVL straight and angle
connector
Screwed straight connec-
tion and horizontal change
of direction
Cable tray
height 35 and
60 mm
3
RLVK straight connector Screwed straight connec-
tion and horizontal change
of direction
Cable tray
height 35 and
60 mm
4RGV adjustable connector Vertical change of direc-
tion, screwed
All cable tray
heights
5RLVL straight connector Screwed-on straight
connection
Cable tray
height 85 and
110 mm
6
WKV angle connector Creation of 90° bend or
corner, screwed-on
Cable tray
height 35 and
60 mm
7REV corner connector Creation of 90° bend for
cables with large bend
radius, screwed-on
All cable tray
heights
Tab. 1: Overview of connectors

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System overview
4.1.3 Fittings
90° bends
12
3
4
2
Fig. 3: 90° bends
No. Designation /type Function Application
1
RB 90 90° bend,
radius 50 mm
Creation of 90° bend, hori-
zontal
100–300 mm
tray width
2
Fastening material, FRS
truss-head bolt with combi-
nation nut
Fastening to cable tray 100–600 mm
tray width
3
RB 90 90° bend,
radius 150 mm
Creation of 90° bend, hori-
zontal
400–600 mm
tray width
4Connector perforation Fastening material retainer 400–600 mm
tray width
Tab. 2: Overview of 90° bends

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Screw-on cable tray systems
System overview
45° bends
1
4
2
2
3
Fig. 4: 45° bends
No. Designation /type Function Application
1
RB 45 45° bend,
radius 50 mm
Creation of 45° bend, hori-
zontal
100–300 mm
tray width
2Fastening material, FRS
truss-head bolt with combi-
nation nut
Fastening to cable tray 100–600 mm
tray width
3
RB 45 45° bend,
radius 150 mm
Creation of 45° bend, hori-
zontal
400–600 mm
tray width
4
Connector perforation Fastening material retainer 400–600 mm
tray width
Tab. 3: Overview of 45° bends

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System overview
Add-on tees
Fig. 5: Add-on tees
1 2 3
4
No. Designation /type Function Application
1
RAA add-on tee incl.
fastening material
Creation of 90° branch 100–300 mm
tray width
2
RAA add-on tee with
connector perforation
Creation of 90° branch 400–600 mm
tray width
3
Connector perforation Fastening material retainer 400–600 mm
tray width
4Fastening material, FRS
truss-head bolt with com-
bination nut
Fastening on cable trays 100–600 mm
tray width
Tab. 4: Overview of add-on tees

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Screw-on cable tray systems
System overview
T branch pieces
1
4
2
2
3
Fig. 6: T branch pieces
No. Designation /type Function Application
1RT T branch piece incl.
fastening material
Creation of 90° branch 100–300 mm
tray width
2
Fastening material, FRS
truss-head bolt with com-
bination nut
Fastening to cable tray 100–600 mm
tray width
3
RT T branch piece with
connector perforation
Creation of 90° branch 400–600 mm
tray width
4
Connector perforation Acceptance of fastening
material
400–600 mm
tray width
Tab. 5: Overview of T branch pieces

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System overview
Cross-overs
2
1
4
3
Fig. 7: Cross-overs
No. Designation /type Function Application
1
RK cross-over incl.
fastening material
Creation of 90° branch 100–300 mm
tray width
2Fastening material, FRS
truss-head bolt with com-
bination nut
Fastening to cable tray 100–600 mm
tray width
3RK cross-over with
connector perforation
Creation of 90° branch 400–600 mm
tray width
4Connector perforation Acceptance of fastening
material
400–600 mm
tray width
Tab. 6: Overview of cross-overs

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Screw-on cable tray systems
System overview
Vertical bend, rising/vertical bend, falling
Fig. 8:
1 2
3
Vertical bend, rising/falling
No. Designation /type Function Application
1Vertical bend, rising
radius 180 mm
Creation of 90° vertical
bend, rising vertically
100–600 mm
tray width
2
Vertical bend, falling
radius 120 mm
Creation of 90° bend,
falling vertically
100–600 mm
tray width
3Connector perforation Fastening material retainer 100–600 mm
tray width
Tab. 7: Overview of vertical bends

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System overview
Adjustable bend element, vertical
1
2
3
4
5
Fig. 9: Adjustable bend elements for height offset
No. Designation /type Function Application
1Adjustable bend element Compensation of height
offset
Creation of vertical bends
with flexible radii
100–600 mm
tray width
2
Half adjustable connector Connection of adjustable
bend element with cable
tray
100–600 mm
tray width
3Curved slot Variable angle adjustment
4
Securing screw Angle fixing
5
SKS hinge screw
M8x16
Fastening of adjustable
bend element
Tab. 8: Overview of adjustable bend elements

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Screw-on cable tray systems
System overview
4.1.4 Cover for cable trays
Covers for cable trays are available without fastening material or with
pre-mounted turn buckles.
1
45
2
3
2
Fig. 10: Covers with fastening material for cable trays
No. Designation /type Function Application
1Cover with pre-mounted
turn buckles
Protection against weath-
ering and dirt
100–600 mm
tray width
2Cover, unperforated Protection against weath-
ering and dirt
100–600 mm
tray width
3
DK DRLU cover clamp Cover fastening, mounting
on the cover with clamps
Perforated and
unperforated
covers
4
DRL H S turn buckle Cover fastening, mounting
on the cover with screws
Perforated and
unperforated
covers
5
DRL H turn buckle Cover fastening, mounting
on the cover with rivets
Perforated and
unperforated
covers
Tab. 9: Overview of covers and fastening material

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System overview
4.1.5 Cover for fittings
Covers are available for all fittings. All the fitting covers are mounted to
the cable tray with the turn buckles pre-mounted at the factory. The fol-
lowing section only shows a portion of the fitting covers. All the available
articles/versions/models are listed in the chapter “9 Technical data” on
page 62.
13 2
Fig. 11: Cover for fittings
No. Designation /type Function Application
1
DFB cover
45° bend
Protection against wea-
thering and dirt
≤ 300 mm tray
width
2
Turn buckle, pre-assem-
bled
Cover fastening Perforated and
unperforated
covers
3
DFB cover
45° bend
Protection against wea-
thering and dirt
≥ 300 mm tray
width
Tab. 10: Overview, 45° covers for fittings

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Screw-on cable tray systems
System overview
4.1.6 Accessories
1
2
4
53
6
7
Fig. 12: Accessories
Designation /type Function Application
1
Bottom end plate Creation of cable exit All tray types
2TSG barrier strip Separation of cables of
different voltages or
functions
All tray types
3Edge protection strip Cover of cut cable tray
edges, protection against
cable damage
All tray types
4Joint plate Connection of cable tray
bases at the joint
All tray types
5Reducer/stop-end End of cable tray,
cable tray width reduction
All tray types
6
FRS truss-head bolt Fastening of fitting to cable
tray
All tray types
7Earthing terminal Creation of equipotential
bonding
All tray types
Tab. 11: Overview of accessories

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Mounting
5 Mounting
The mounting of the support systems for the cable tray systems takes
place according to the local circumstances and the planned loads. The
mounting of the different support systems is shown in special mounting
instructions, see “1.6 Applicable documents” on page 6.
The mounting drawings of the screw-on cable tray systems show either
perforated or unperforated cable trays. All the connectors, fittings and
accessories shown can be mounted on both perforated and unperforated
cable trays. If unperforated cable trays are cut, then the connector
perforation must be re-drilled.
When mounting the FRS truss-head bolts and SKS hinge screws made
of steel or stainless steel from OBO Bettermann, the following tightening
torque must be applied:
Thread Tightness class 5.6 Tightness class 8.8
M6 4.80 Nm 11.30 Nm
M8 11.60 Nm 27.30 Nm
Tab. 12: Torques for steel screws from OBO Bettermann
Thread Resistance grade 70 Resistance grade 80
Friction coefficient 0.14 Friction coefficient 0.14
M6 9.70 Nm 12.90 Nm
M8 23.60 Nm 31.50 Nm
Tab. 13: Torques for stainless steel screws from OBO Bettermann