Powerware 9315 - Manual (Page 122)

INSTALLATION REFERENCE
EATON Powerware ® 9315 UPS (500–750 kVA) Installation and Operation Manual S 164201244 Rev E www.powerware.com A-12
A.3 Power Wiring Installation Notes
Read and understand the following notes while planning your installation:
1. Refer to national and local electrical codes for acceptable external wiring
practices.
2. Material and labor for external wiring requirements are to be provided by
designated personnel.
3. For external wiring, use 90 °C copper wire. See the appropriate column in
Table E through Table G. Wire sizes are based on using a continuous duty
rated breaker.
4. Wire ampacities are chosen from Table 310-16 of the National Electrical Code
(NEC). Wire is 90°C specification.
5. The neutral conductor is considered to be a current‐carrying conductor per note
10 of the Notes to Ampacity Table 310 of the NEC. If a neutral is used, the
wire is derated by 80% per Note 8(a) of the Notes to Ampacity Table 310
assuming 4–6 conductors in a raceway. If there is no neutral, it is assumed that
there are only 3 current carrying conductors in a raceway (one per phase).
6. All circuit breakers provided as part of the UPS system that employ adjustable
trip mechanisms have been set to their maximum settings. Based upon the
energy available and other equipment located on-site, these settings may need
to be adjusted to ensure proper system operation and coordination. It is the
customer's responsibility to conduct a breaker coordination study, so that
these breakers can be adequately set for the site.
7. A bypass neutral feeder must be supplied when the output neutral is used. If
no bypass neutral feeder is supplied, the output neutral of the UPS is to be
connected to chassis ground.
8. See Section I for installation instructions.