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Isolated Output Wiring Diagrams
46
Powerware
®
9170 User's Guide S LTM-1344 B Uncontrolled Copy
System Wiring Diagrams
The following notes are referenced in the isolated system wiring
diagrams (Figure 37 through Figure 40). To determine which diagram is
correct for your site, see Table 6 on page 43.
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 26).
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 53. The wires coming from the side of the switch must be connected as
described in Step 10 on page 33.
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 and equipment grounding
conductors, must be the same size (ampacity), have the same rating (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 13 on page 78 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 17 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 to X3. X1 produces
only 88V at 208V nominal output, and 93V at 220V.