APC PX - Page 30

Input Wiring
n Read this chapter completely before installing wiring.
n Verify that all incoming line voltage (mains power)
and low voltage (control) circuits are de-energized and
locked out before installing cables or making connec-
tions, whether in the junction box or to the
Symmetra
TM
Power Array.
n Always verify that all battery modules are removed
and all battery extension frames are disconnected from
the Power Array before installing wiring.
Input Wiring SpecificationsInput Wiring Specifications
Input Wiring SpecificationsInput Wiring Specifications
Input Wiring Specifications
The Power Array requires a single phase 220V, 230V, or 240V
50 or 60Hz incoming utility (mains) power source. A 3-con-
ductor cable (2 live, 1 ground) is to be brought to two input
wiring terminal blocks inside an adequate length of flexible
metal conduit. To minimize disturbances caused by other
loads in the building, input wiring should be supplied di-
rectly from the service entrance (a dedicated power feeder).
All electrical service, both input and output, must be sized in
accordance with local building codes. The circuit for input
power must be adequate to carry the full load of the system
and the load equipment. The 3-conductor input cable should
be sized for no more than 3% voltage drop.
A 20 mm (3/4") knockout in the input wiring access panel
provides access to the terminal blocks.
See table 4-1 for input wiring specifications.
4-2
Chapter 4 - Electrical Requirements and Procedures
Input WInput W
Input WInput W
Input W
iring Priring Pr
iring Priring Pr
iring Pr
ocedurocedur
ocedurocedur
ocedur
eses
eses
es
1. Refer to figure 4-1. Locate the input wiring entry and
input wiring inspection panels at the rear of the frame.
2. Remove the four screws securing the panels to the frame.
Remove only the screws indicated in the illustration. Place
the screws and panels aside.
Fig 4-1 Removal of Input Hardwiring Panels
3. Pull the input wires through an adequate length of 20 mm
(3/4") flexible metal conduit, leaving about 51.3 cm (20") of
wiring extending from the end. Install a flexible metal con-
duit connector to the end of the conduit. Using appropriate
tools, remove the knockout in the entry panel. Feed the wires
through the entry panel, and attach the flexible metal con-
duit connector to the panel.
4. Strip 13mm (1/2") of insulation from the end of each of
the incoming wires.
5. Note the positions of the ground wiring terminal block
and the input wiring terminal block. See figure 4-2.
tupnItupnI
tupnI
tupnItupnI
egatloVegatloV
egatloV
egatloVegatloV
sulperiw-2(sulperiw-2(
sulperiw-2(
sulperiw-2(sulperiw-2(
)dnuorg)dnuorg
)dnuorg
)dnuorg)dnuorg
emarFemarF
emarF
emarFemarF
eziSeziS
eziS
eziSeziS
AVk.xaM(AVk.xaM(
AVk.xaM(
AVk.xaM(AVk.xaM(
)gnitaR)gnitaR
)gnitaR
)gnitaR)gnitaR
lluFtupnIlluFtupnI
lluFtupnI
lluFtupnIlluFtupnI
daoLdaoL
daoL
daoLdaoL
egarepmAegarepmA
egarepmA
egarepmAegarepmA
tupnItupnI
tupnI
tupnItupnI
tnerrucrevOtnerrucrevO
tnerrucrevO
tnerrucrevOtnerrucrevO
noitcetorPnoitcetorP
noitcetorP
noitcetorPnoitcetorP
)lanretxE()lanretxE(
)lanretxE(
)lanretxE()lanretxE(
&tupnImuminiM&tupnImuminiM
&tupnImuminiM
&tupnImuminiM&tupnImuminiM
eguaGeriWdnuorGeguaGeriWdnuorG
eguaGeriWdnuorG
eguaGeriWdnuorGeguaGeriWdnuorG
caV032,caV022
caV042ro
)AVk8(iniM
)AVk61(retsaM
pmA53
pmA07
pmA05
pmA001
)mm462,3(eguaG8#
)mm981,5(eguaG4#
Table 4-1 Input Wiring Specifications
Entry Panel