Grounding Safety - Nokia 7368 ISAM ONT E-240G-B Product Manual

Grounding safety

9.1 Grounding safety
Improper grounding can result in personal injury or equipment damage. See below
for specific dangers and considerations when handling grounding equipment.
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Release 06.01.01 | June 2019 | Edition 09
Hazardous electrical voltages and currents can
Danger 1 —
cause serious physical harm or death. Always use insulated
tools and follow proper safety precautions when connecting or
disconnecting power circuits.
Make sure all sources of power are turned off and
Danger 2 —
have no live voltages present on feed lines or terminals. Use a
voltmeter to measure for voltage before proceeding.
Always contact the local utility company before
Danger 3 —
connecting the enclosure to the utilities.
You must connect the ONU to earth ground before
Danger 4 —
connecting the power supply to the ONU.
The earth bonding terminal shall be connected to
Danger 5 —
an approved earth connection before the ac power is applied.
Earthing and bonding of the ONU must comply
Danger 6 —
with the ANSI-specific requirements found in NEC Article 250.
•
Insulation - The grounding conductor must be insulated and
listed as suitable for the purpose.
•
Material - The grounding conductor shall be copper or other
corrosion-resistant conductive material stranded or solid.
•
Size - The grounding conductor must be a minimum of
14 AWG per UL investigation. If local code or regulations
require more, follow per local codes or regulation.
•
Length - The primary protector grounding conductor must be
as short as practicable. In one- and two-family dwellings, the
primary protector grounding conductor must be as short as
practicable, not to exceed 20 ft (6.0 m) in length.
•
If the building or structure served has no grounding means,
as described in 800.100 (B)(1) or (B)(2)(1) of NEC
Article 250, the communications grounding conductor must
be connected to either of the following:
a) to any one of the individual electrodes described in 250.52
(A)(1), (A)(2), (A)(3), or (A)(4).
b) to an effectively grounded metal structure or to a ground
rod or pipe not less than 5 ft (1.5 m) in length and 1/ 2 in.
(12.7 mm) in diameter, driven, where practical, into
permanently damp earth, and the communications ground
rod shall be bonded to the power grounding electrode
system in accordance with 800.100 (D).
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7368 ISAM ONT E-240G-B Product Guide
Issue: 01