Isolated Output Wiring Diagrams
54
Powerware
®
9170
+
UPS User’s Guide S Rev B www.powerware.com
System Wiring Diagrams
The following notes are referenced in the isolated system wiring
diagrams (Figure 38 through Figure 41). To d etermine which diagram is
correct for your site, see Table 9 on page 51.
NOTE 1 The customer must provide input overcurrent protection as
stated in NEC Section 240-21 or local codes. Size the protection device
according to local code requirements (see Table 1 on page 21).
NOTE 2 The UPS bypass switch must be installed within sight of the
UPS. To properly install, complete the voltage and phase check procedure
in “Startup for Hardwired Units” on page 68. The wires coming from the
side of the switch must be connected as described in Step 11 on page 30.
NOTE 3 The customer must provide and install this ground (earth)
connection per NEC Sections 250-20, 250-30, 250 -62, and 250-64, or local
code requirements.
NOTE 4 All AC circuit conductors, including the neutral conductor,
mustbethesamesize(ampacity),havethesamerating(75°C) copper wire,
and be sized according to the input circuit breaker. The UPS input and
output conductors must be run through separate conduits.
NOTE 5 The customer must provide output overcurrent protection. See
NEC Section 240-21 or local requirements. See Table 1 6 and Table 17 on
pages 97 and 99 for maximum output overcurrent protection device
ratings.
NOTE 6 For maximum protection against electrical noise, use isolated
ground receptacles. See NEC Section 250-146(d).
NOTE 7 See “Equipment Clearances” on page 7 for installation and
service clearances before installing the UPS. Use flexible conduit on the
UPS or the external battery cabinet if either must be moved.
NOTE 8 External UPS battery cabinets are optional. See “Battery
Cabinet Installation” on page 57 for installation instructions.
NOTE 9 UPS output circuits shall be installed in dedicated conduit
systems and not shared with other electrical circuits.
NOTE 10 Do not connect output wiring to X1 when connecting L1 t o X3.
X1 produces only 88V at 208V nominal output, and 93V at 220V.
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