UL 467-2017 pdf download

UL 467-2017 pdf download.Grounding and Bonding Equipment.
6.10.2 Rod electrodes
6,10.2.1 In Canada and Mexco, a rod electrode shall not be less than 3 m (10 ft) long.
In the United States, a rod electrode shall be not less than 2.44 m (8 tt) long.
6.10.2.2 In Mexico, a solid rod electrode of iron or steel shall have a diameter not less than 16 mm (518 In Canada, a solid rod electrode of iron or steel shall have a diameter not less than 15.8 mm (5/8 in).
In the United States, a solid rod electrode of iron or steel shall have a diameter not less than 15.87 mm (5/8 In).
6.10.2.3 In Mexico. an uncoated solid rod electrode of stainless steel. copper. o suitable nonferrous metal shall have a diameter of not less than 14.8 mm (0.583 in).
In Canada and the United States, a solid rod electrode of stainless steel, copper, or suitable nonferrous metal shall have a diameter not less than 12.7 mm (1/2 in).
6.10.2.4 A coated solid rod electrode of iron or steel shall have a zinc, stainless steel, copper. or suitable nonferrous metal coating and shall have a diameter of not less than 12.7 mm (1/2 in).
6.10.2.5 The stainless steel coating shall not be less than 0.38 mm (0.015 in) thick at any point.
6.10.2.6 The copper coating shall not be less than 0.25 mm (0.010 in) thick at any point and shall comply
with the adherence requirement in Clause 7.7.1 and the bending requirement in Clause 7.7.2. 6.10.2.7 A zinc coating shall not be less than 0.099 mm (0.0039 in) thick at any point and shall comply with the adherence requirements in Clause 7.7.1 and the bending requirements in Clause 7.7.2.
6.10.2.8 The stainless steel coating or a stainless steel rod shall be formed of an austenitic stainless steel of the 18% chromium. 8% nickel type.
6.10.3 Chemically charged rod electrodes
6.10.3.1 A hollow tube, chemically-charged-rod electrode shall
a) be constructed of copper or an equivalent material resistant to the corrosive effects of moist soil;
b) have an internal diameter not less than 49.3 mm (1.94 in) and a wall thickness not less than 193 mm (0.076 in):
C) comply with the minimum length In Clause 6.10.2.1; and
d) be accompanied by adequate installation and maintenance instructions.
6.10.3.2 The chemical charge within the rod electrode shall be a substance that does not cause the electrode to corrode at a faster rate than an electrode constructed of trade size 3/4 (21) ferrous metal conduit.
6.10.3.3 A chemical charge of 60% sodium chloride and 40% calcium chlonde having a total weight of less than 5 kg (11 Ib) may be used without furiher evaluation.
6.10.4 Plate electrodes
6.10.4.1 A plate electrode shall
a) be nol less than 6.4 mm (114 an) in thickness II of iron or steel, or 1.5 mm (0.06 in) If of nonferrous metal, other than aluminum;
b) have a total surface area of not less than 0.186 m2 (2 ft2):
C) if provided with a means of connection to the system grounding conductor, have connections that comply with the requirements of Clauses 6.1.3, 7.1 • and 7.5: and
d) shall be marked In accordance with Clause 10.10.
6.10.4.2 In Canada, a plate electrode for concrete encasement shall
a) be nol less than 6 mm (0.24 in) in thickness if of iron or steel or 1.5 mm (0.06 in) if of nonferrous metal, other than aluminum;
b) have a total surface area of not less than 0.4 m2 (4.3 It2);
C) have a means of connection to the system-grounding conductor that shall be accessible. Soldertess connections used for attachment to the system grounding conictor shall comply with the requirements of Clauses 6.1.3. 7.1, and 7.5; and
d) comply with the requirements of Clauses 6,4 and 10.11.
In the United States, the requirements of Clause 6.10.4.1 apply to all plate electrodes.