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Chapter 2. Installation
GROUNDING INSTRUCTIONS (UL 1459)
2 8
Grounding instruction information from the
Underwriters' Laboratory UL 1459 Standard for Safety:
Telephone Equipment, of September 20, 1993, is pro-
vided 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 equip-
ment 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 on AC units.
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 Na-
TSU 600 User Manual
61200.076L2-1
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