ADTRAN 1200410L2, User Manual

Page: 22 / 80

Chapter 2. Installation
22 ESU LT User Manual 61200410L2-1A
POWER CONNECTION
Power is supplied to the ESU LT through an IEC-type power
connector on the rear of the unit.
Grounding Instructions
Grounding instruction information from the Underwriters'
Laboratory UL 1950 3rd Edition is provided in this section. An
equipment grounding conductor that is not smaller in size than the
ungrounded branch-circuit supply conductors is to be installed as
part of the circuit that supplies the product or system. Bare,
covered, or insulated grounding conductors are acceptable.
Individually covered or insulated equipment grounding conductors
shall have a continuous outer finish that is either green, or green
with one or more yellow stripes. The equipment grounding
conductor is to be connected to ground at the service equipment.
The attachment-plug receptacles in the vicinity of the product or
system are all to be of a grounding type, and the equipment
grounding conductors serving these receptacles are to be connected
to earth ground at the service equipment. A supplementary
equipment grounding conductor shall be installed between the
product or system and ground that is in addition to the equipment
grounding conductor in the power supply cord.
The supplementary equipment grounding conductor shall not be
smaller in size than the ungrounded branch-circuit supply
conductors. The supplementary equipment grounding conductor
shall be connected to the product at the terminal provided, and shall
be connected to ground in a manner that will retain the ground
connection when the product is unplugged from the receptacle. The
connection to ground of the supplementary equipment grounding
conductor shall be in compliance with the rules for terminating
bonding jumpers at Part K or Article 250 of the National Electrical
Code, ANSI/NFPA 70. Termination of the supplementary
Power to the ESU LT must be from a grounded 90-240 VAC, 50/60 Hz
power source.