Grounding - Toshiba Perfecptione Installation And Maintenance Manual

INSTALLATION INSTRUCTIONS
SECTION 200-255-203
FEBRUARY 1992
l
Digital DSS - 1,000 cable feet (305 M), 24 AWG
4.01 Acceptable cable for all telephones is 22 or 24
AWG twisted pair inside telephone station cable
(jacketed but not shielded). Two twisted pairs are
required for the electronic telephone, one pair for a
standard telephone, and one twisted pair for the
digital telephone, even if equipped with a PDIU-DI.
Three twisted pairs are required for an electronic
telephone equipped with a DDIU-MAT. The stand-
alone DDIU-MA/PDIU-DS requires one twisted
pair.
4.02 A 25-pair cable is required for the attendant
console. The console is equipped with a male 50-
pin amphenol-type connector.
WARNING!
1. Never install telephone wiring during a
lightning storm.
2.
Never
install telephone jacks in wet
locations, unless the jacks are specifi-
cally designed for wet locations.
3. Never touch uninsulated telephone
wires or terminals unless the telephone
line has been disconnected at the in-
terface.
4. Use caution when installing or modi-
fying telephone lines.
5. GROUNDING
5.00 The following grounding directions are re-
quired in order to comply with the Underwriters'
Laboratories' Standard 1459 2nd edition:
1) Redundant and independent equipment
grounding conductors are to be installed be-
tween the product and the wiring system
ground.
2) One of the equipment grounding conductors
(ground 1) shall be an insulated grounding
conductor. Its size shall not be smaller than
the size of the grounded and ungrounded
branch-circuit supply conductors. It shall also
have their equivalent insulation material and
thickness, except that it is green with, or
wilthout, one or more yellow stripes. This
GROUND 1; THIRD WIRE GROUND
TO AC POWER CORD
Perception
3EDICATED
4C OUTLET
NITH THIRD
NIRE GROUND
-0 GROUND
;YSTEM GROUND
EXTERNAL GROUND SCREW
ON PERCEPTION CABINET
GROUND 2;
PER GENERAL RULES
OF ARTICLE 250 OF
THE NATIONAL
ELECTRICAL CODE, NFPA70
FIGURE 3-3-UL GROUNDING DIAGRAM
insulated grounding conductor is to be in-
stalled as part of the circuit that supplies the
system, and it is to be connected to ground at
the service equipment.
3) The other conductor (ground 2) shall comply
with the general rules for grounding contained
in Article 250 of the National Electrical Code,
NFPA70, but shall not depend on the cord and
plug of the product.
3-2