Alpha Technologies UPE-8 - Manual (Page 20)

2. Installation
20 031-165-C0-001 Rev. A
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” trip 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.
Alpha Technologies offers a high-magnetic Square D circuit breaker, meter, and a BBX
option. Contact your local sales representative for more information.
Wiring: (from duplex receptacle to service disconnect)
In most cases, the following configurations (see next page) qualify for service entrance use,
however, other codes may apply. Always contact your local utility to verify that the wiring
conforms to applicable codes.