Original Version
Rule 54.4-G
54.4-G. From Grounded Metal Boxes and Equipment
On Wood poles or structures, all grounded metal boxes and grounded metal cases for equipment shall not be less than 3 feet above or 6 feet below the level of unprotected supply conductors, excepting street light drop wires which are not less than the distances specified in Rule 92.1-F5 from the messengers, conductors or metal boxes therein mentioned. Where it is impracticable to obtain a clearance of at least 6 feet below unprotected supply conductors of 750 volts or less, a clearance of not less than 4 feet below such conductors will be permitted if a protective covering or guard is provided above such metal box or case.
This requirement does not apply to bends and terminals of risers or runs , which shall be treated as specified in Rule 54.6-F, nor to certain transformer cases as provided in Rule 58.3-C3, nor to the cases of oil switches treated as specified in Rule 52.7-F2.
Metal Conduit boxes and fittings of runs or risers shall be treated in accordance with the provisions of Rules 54.6-D, E and F.
Strikeout and Underline Version
Rule 54.4-G
54.4-G. From Grounded Metal Boxes, Hardware and Equipment
On Wood poles or structures,
all grounded metal boxes, hardware and grounded metal cases for
equipment, on non-metallic poles or non-metallic structures shall be a
minimum of 36’’ above and 30’’ below the next level of unprotected
conductors. Such equipment shall have a
minimum clearance of 48 inches above or below communication line conductors of
different ownership. See Figure 54-4. shall not be less than 3 feet above or 6
feet below the level of unprotected supply conductors, excepting street light
drop wires which are not less than the distances specified in Rule 92.1-F5 from
the messengers, conductors or metal boxes therein mentioned. Where it is impracticable to obtain a
clearance of at least 6 feet below unprotected supply conductors of 750 volts
or less, a clearance of not less than 4 feet below such conductors will be
permitted if a protective covering or guard is provided above such metal box or
case.
This requirement does not
apply to bends and terminals of risers or runs , which shall be treated as
specified in Rule 54.6-F, nor to certain transformer cases as provided in Rule
58.3-C3, nor to the cases of oil switches treated as specified in Rule 52.7-F2.
Metal Conduit boxes and
fittings of runs or risers shall be treated in accordance with the provisions
of Rules 54.6-D, E and F.
EXCEPTIONS:
(1) 0-750 volt conductors (not including jumpers) - a 10" radial clearance is required.
(2) Equipment (e.g. in Rule 58.6) operated at 0 - 750 volts and mounted not less than 15 inches from the surface of the pole. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
(3) Grounded portions of risers and their associate" terminal fittings, brackets and hardware. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
(4) Lightning arrestors, grounded insulator pins and insulators with grounded bases and their associated supports. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
Any item grounded in accordance with this rule shall be effectively grounded (see Rule 33.3).
Final Version
Rule 54.4-G
54.4-G.
From Grounded
Metal Boxes, Hardware and Equipment
All grounded metal boxes,
hardware and equipment, on non-metallic poles or non-metallic structures shall
be a minimum of 36’’ above and 30’’ below the next level of unprotected
conductors. Such equipment shall have a
minimum clearance of 48 inches above or below communication line conductors of
different ownership. See Figure 54-4.
EXCEPTIONS:
(1) 0-750 volt conductors (not including jumpers) - a 10" radial clearance is required.
(2) Equipment (e.g. in Rule 58.6) operated at 0 - 750 volts and mounted not less than 15 inches from the surface of the pole. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
(3) Grounded portions of risers and their associate" terminal fittings, brackets and hardware. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
(4) Lightning arrestors, grounded insulator pins and insulators with grounded bases and their associated supports. These clearances shall not be less than the radial clearances required for incidental pole wiring by Table 2, Cases 16 and 17.
Any item grounded in accordance with this rule shall be effectively grounded (see Rule 33.3).
