UPS INSTALLATION PLAN AND UNPACKINGEATON Powerware® 9395 UPS (450–550 kVA) Installation and Operation Manual 164201701 Rev 2 www.powerware.com3−63.2.2 UPS System Power Wiring PreparationRead and understand the following notes while planning and performing theinstallation: Refer to national and local electrical codes for acceptable external wiring practices. To allow for future kVA upgrades, consider installing a derated UPS using wiringand external overcurrent protection breakers sized for a fully rated UPS. For external wiring, use 90°C copper or aluminum wire. Wire sizes listed inTable 3-4 and Table 3-5 are for copper wiring only. If wire is run in an ambienttemperature greater than 30°C, higher temperature wire and/or larger size wiremay be necessary. Wire sizes are based on using the specified breakers. Wire ampacities are chosen from Table 310−16 of the National Electrical Code®(NEC®). Specification is for copper wire with a 90°C rating. Material and labor for external wiring requirements are to be provided bydesignated personnel. If installing a maintenance bypass, a minimum of two separate feeds withupstream feeder breakers, or a single feed with two upstream feeder breakers,must be provided: one for the UPS or rectifier input breaker (RIB) (if installed) andone for the maintenance bypass input. DO NOT use a single feed or a single feederbreaker to supply both the UPS or RIB and the maintenance bypass. If a bypassinput breaker (BIB) is installed in the maintenance bypass and a single−feed UPS isbeing installed, a single feed to the maintenance bypass is acceptable for supplyingboth the UPS and the bypass. The bypass feed into this equipment uses three or four wires. The rectifier feedinto this equipment uses three wires. The phases must be symmetrical aboutground (from a Wye source) for proper equipment operation. If the load requires a neutral, a bypass source neutral must be provided. If the loaddoes not require a neutral and there is no neutral conductor connected at thebypass input, a neutral to ground bonding jumper must be installed. DO NOT installboth a source neutral and a bonding jumper. See Table 3-4 or Table 3-5 for neutralbonding jumper wire sizes. The bonding jumper must be copper wire. The UPS cabinet is shipped with debris shields covering the ventilation grills on topof the cabinet. Do not remove the debris shields until installation is complete.However, remove the shields before operating the UPS. Once the debris shieldsare removed, do not place objects on the ventilation grills. In a common battery system, single and multiple UPMs are powered from onecommon battery source. In a separate battery system, multiple UPMs are eachpowered from separate battery sources. UPMs in distributed bypass and parallel systems must use a separate batterysystem. On a UPS configured for separate rectifier inputs, all sources that feed theseparate rectifier inputs must be derived from a common ground point. On a UPS configured as an Input Output Module (IOM), requirements for bypassinput wiring, termination, conduit, and bypass breaker are not applicable. A Field Installed UPM (FI−UPM) is always designated as UPM 4.
