MGE UPS Systems EX 7RT - Manual (Page 37)

Installation and User Manual
2.8 Connecting the Input and Output Power Cables to the Input/Output Box
WARNING This type of connection must be carried out by qualified electrical personnel.
Before carrying out any connections, check that battery circuit breaker is OFF
and that the upstream protection devices (Normal and Bypass AC
sources) are open (OFF).
EX 5/7/11 RT UPS always comes from factory with Normal and Bypass AC inputs
already connected together, using a shunt.
2.8.1 Flexible Cordage and Conduit Installations
Figure 2-12a: Step 1 & 2; Typical plastic and metal coupling installations.
14
Installation 2 — 13 86-86000-00 A01
OFF 0 OFF 0
3. Typical Flexible Cordage Installation
Inner circle is for
Metal strain relief
Outer circle is for
Plastic strain relief
(a)
(b)
4. Typical 90 ° Metal Conduit Installation
(a)
Terminal Block Cover
(c)
(d)
I/O BOX
NOTE: Place lug ring inside
the terminal block cover.
Screw coupling into lug ring.
NOTE: Place lug ring inside
the terminal block cover.
Screw coupling into lug ring.
(b)
(c)
(d)
OFF O
OFF O
OFF O OFF O
2
OFF O
1
1. Knockout die stamp circles.
NOTE Terminal cable capacity:
Max. 4 AWG (11kVA), 6 AWG
(5/7kVA).
Knockout die stamp
circles (on terminal block
cover) have two sizes that fit
either plastic or metal
coupling. Plastic coupling is for
flexible cordage
and metal coupling is for solid
wires. Knock out appropriate
circle for your application.
2. Remove bottom cover plate as shown.
3. Typical plastic strain relief installation:
a) Secure strain relief body onto the
knockout plate.
b) Strip the jacket back to expose the
three wires. Strip the insulation of
each wire back 1/2”. Insert the
ferrules as shown to each wire.
CAUTION: Always connect the
earth ground wire first.
c) Slide the cordage into the strain relief
and secure the wires into the
terminal blocks using the guide
printed on bottom of I/O box.
d) Secure the cordage retainer nut.
4. Typical 90° metal conduit installation.
a) Secure strain relief body to knockout
plate as shown.
b) Insert three wires through flexible
conduit and bend 90°.
c) Strip the insulation back 1/2” to
expose solid wire and secure three
wires into the terminal block using
guide printed on bottom of I/O box.
CAUTION: Always connect the
earth ground wire first.
d) Install strain relief cover using two
screws.