Alpha Technologies UPE-6L - Manual (Page 21)

2. Installation
21 031-178-C0-001 Rev. A
240VAC Service (XM Series 2 915-240 Power Supply for UPE-3L and UPE-6L): Enclosures used
with the XM Series 2 915-240 is equipped with one or two 240VAC duplex receptacles to provide
power to the power supply and peripheral equipment. The receptacle, NEMA 6-15R, is protected
by a single, 2-pole, common trip 15 Amp circuit breaker located inside the service entrance.
Wiring is typically 14AWG per NEC code, a grounding clamp, located on the enclosure, facilitates
dedicated grounding.
120VAC 20A Service (XM Series 2 915-120 Power Supply):
Enclosures used with the XM Series 2 915-120 are equipped with one or two 120VAC duplex
receptacles to provide power to the power supply and peripheral equipment. The receptacle,
NEMA 5-20R, is protected by a single pole 20 Amp circuit breaker located inside the service
entrance. Wiring is typically 12AWG per NEC code, a grounding clamp, located on the enclosure,
facilitates dedicated grounding.
NOTE: Alpha recommends wiring with 12AWG, in case the enclosure is
to be upgraded from 240 VAC 15 Amp to 120 VAC 20 Amp
2.4 Utility Power Connection
CAUTION: The “Utility Power Connection” procedure must ONLY be performed by qualified
service personnel and in compliance with local electrical codes and common
safety practices. Connection to utility power must be approved by the local
utility before installing the power supply.
NOTE: CSA and NEC require that a service disconnect switch be provided
by the installer and be connected between the power source and the ALPHA
power supply. Connection to the power supply must include an appropriate
service entrance weather head.
Wiring the Utility Service
Utility power enters the enclosure through the side or bottom of the UPE. The enclosure
accepts a standard electrical fitting. The UPE Series can be equipped with an optional circuit
breaker assembly located in the enclosure’s module compartment.
NOTE: A “high-magnetic” or HACR (Heating, Air Conditioning, Refrigeration) circuit
breaker must be used in order to accommodate the high-inrush currents
normally associated with the start-up of ferroresonant transformers
(400 Amp, no-trip, first-half cycle). Do not replace this circuit breaker with a
conventional service entrance circuit breaker. Alpha recommends Square D
circuit breakers ONLY, because of increased reliability in this powering
application.