Section BXM‐204‐HE3‐20A
030‐101446 Rev. B
R
5
1311IARB
* Concentric knock‐outs: when removed from one side, a 1/2” hole is formed, when
removed from the opposite side, a 3/4” hole is formed.
5” in
12”
Customer
Knock-outs
2 Network
Knock-outs
Ground
rack
channel*
of rack
channel**
TOP VIEW
Door switch assembly
Rack channel
14.5”
plate
2”
2”
** Factory default position.
2”
(adjustable,
reversible)
*
*
2”
Channel is adjustable to multiple positions.
Knock‐out for cables from optional battery box or for Network
*
AC duplex outlets
GFI Duplex
behind
front
Outlet
(uses 1 knock‐out)
Figure 8. Bottom Isometric View of Cabinet
2” Knock‐outs
Factory‐installed fitting
(for 1/2” AC conduit, installed
through 1.125” hole)
Concentric knock‐out
(typically used as access for option
al battery cable,when used with a
battery box, or for Network cables)
Figure 9. “See‐Through” Top View of Cabinet, Door Off
Small knock‐out
(1 of 5, for attach
ing a battery box)
*
*
sufficient strength, quality and size to support the cabinet plus all
equipment to be mounted in it.
2.1.2.6 Side Lift Ears
The Boxer‐20 cabinet is equipped with two removable external
lift ears or brackets, one on each side, attached at the top of the
cabinet (see Figure 3). These lift ears can be used to lift the cabi
net using lift equipment, for mounting purposes. Each ear has a
hole with a 2” diameter, to accommodate various cable, strap, or
hook sizes. Always use two straps of equal lengths, one for each
lift ear, when using this method to lift the cabinet. Remove the
ears if mounting with a Boxer side car (use the same hardware).
Do not use these lift ears for permanent mounting.
2.1.2.7 Bottom Floor Knock‐outs
Multiple knock‐outs are provided on the floor of the cabinet.
One near the center rear of the floor is for cable ingress and
egress for an optional battery cabinet that can be mounted below
the Boxer‐20 cabinet (or for Network cables). Provided on the
right side of the cabinet floor are multiple intact knock‐outs, for
easy Network and Customer cable access. The front‐most three
are typically for customer cable access, and the rear‐most knock‐
outs are typically for Network cable access. The knock‐out sizes
and quantities are shown in Table 1 and Figure 9. A “concentric”
knock‐out is provided for both Customer and Network access:
depending upon which direction the knock‐out is removed, ei
ther a 1/2” or 3/4” hole will be produced. Do not remove a
knock‐out unless it is absolutely necessary to do so for cable in
gress and egress, and use either tight‐fitting rubber grommets or
liquid‐tight fittings, or other proper and approved knock‐out
hole sealants, to assure the best internal air quality and weather‐
resistance. Always use proper and company‐approved tools to
remove knock‐outs. There are five, small, 0.575” diameter
knock‐outs in the floor of the Boxer‐20 cabinet where an option
al battery box attaches to the cabinet (hole patterns of both units
match).
‐ KNOCK‐OUT REMOVAL NOTE ‐
Always remove knock‐outs where holes are desired before
mounting the cabinet or the optional battery box, regardless of
the type of knock‐out and the order of the mounting steps.
Function Quantity Description
Customer
22.5” knock‐out for 2” conduit
31.125” concentric knock‐out, can be
used for 1/2” or 3/4” conduit.
Network
22.5” knock‐out for 2” conduit
11.125” concentric knock‐out, can be
used for 1/2” or 3/4” conduit.
Battery
Box 50.575” diameter knock‐outs, matches
hole pattern in optional battery box
Table 1. Knock‐out Sizes and Quantities
2.1.2.8 AC Conduit Fitting
A 1/2” AC conduit fitting is provided on the exterior bottom sur
face of the cabinet (see Figure 8) through a knock‐out hole near
the back right corner, to facilitate conduit attachment or power
cable access. The fitting is connected to an AC outlet box imme
diately above it inside the cabinet.
2.2 Interior Features
The interior cabinet features are described hereunder.
2.2.1 Internal 19” Rack Channels
Two removable/adjustable rack channels inside the cabinet pro
vide 20‐RU‐high 19” relay rack mounting for equipment that is
to be mounted in the cabinet. Each adjustable channel is factory‐
installed so approximately 5” of equipment space is available
from the inside of the closed front door to the channel (for up
to a 5” equipment projection), and approximately 12” of equip
ment space is available behind the channel to the rear cabinet
wall. The channels can be moved forward or backward the entire
depth of the cabinet, as needed, if more equipment depth is
needed at either the front or back of the channel. Multiple holes
are provided for multiple channel positions. Each rack channel
has predrilled holes, with standard hole spacings (either 1”,
1.75”, or 2” rack hole patterns), to mount customer‐supplied
equipment in the cabinet. Network equipment up to 20 Rack
Units (20 RUs = 35”) high can be mounted on the internal rack
inside the cabinet, either as a single piece or multiple pieces of
equipment.
