Grounding Instructions - ADTRAN TDU 120e User Manual

GROUNDING INSTRUCTIONS

61202156L2-1
Grounding instructions from the Underwriters' Laboratory
UL 1950 3rd Edition are provided in this section.
An equipment grounding conductor that is not smaller in
size than the ungrounded branch-circuit supply conduc-
tors 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 connect-
ed 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.
• 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 ground-
ing 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 pro-
vided and shall be connected to the ground in a man-
ner that will retain the ground connection when the
product is unplugged from the receptacle.
TDU 120e User Manual
Chapter 2. Installation
2-3