Unit installation

PROSTAR DCS COMPACT INSTALLATION
TECHNICAL MANUAL PART 2 JUNE 1995
2–2
2.4 GROUNDING
In order to comply with the revised UL 1459 Telephone Equipment document, the
following paragraphs must be incorporated into this installation manual.
“UL 1459 Paragraph 66. To be included in Installation Instructions.
“66.1.A 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, green with one or more yellow
stripes. The equipment grounding conductor is to be connected to ground at the
service equipment.
“66.1.B 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.
“Paragraph 66.1 revised December 13, 1991.”
WARNING: HIGH LEAKAGE CURRENT
Earth Connection Essential Before Connecting Supply
The DCS COMPACT system requires a supplementary (see below) earth ground to be
connected to the KSU in addition to the third wire ground. The grounding lug on the
bottom of the KSU must be connected to a ground rod, bonded building steel or cold
water pipe using at least #16 AWG copper wire (see Figure 2–4). The third wire ground
should not be removed as previously stated in early release manuals.
The following is a definition of a supplementary ground as defined by UL 1459
Telephone Equipment.
“Paragraph 66. To be included in the Installation Instructions.
“66.2.A 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.
“66.2.B 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
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