Electrical
Systems
Manufacturer Requirements
FEDERAL LAW
183.430 - Conductors in Circuits
of Less Than 50 Volts
(a) Each conductor in a circuit that
has a nominal voltage of less than 50 volts must:
(1) Meet the requirements of 183.435;
or
(2) Meet:
(i) The insulating material
temperature rating requirements of SAE Standard
J378; and
(ii) SAE Standard J1127 or SAE
Standard 1128.
(b) This section does not apply
to communication systems; electronic navigation equipment,
resistance conductors that control circuit amperage;
and pigtails of less than seven inches of exposed
length.
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This section allows alternate choices of conductor
requirements for circuits less than 50 volts. Conductors for
circuits less than 50 volts may be used if they:
(a) meet the requirements of SAE J1127 “Battery
Cable” or SAE J1128 “Low Tension Primary Cable”
and the insulating material temperature rating requirements
of SAE J378 “Marine Engine Wiring” such as those
designated:
GPT, HDT, SGT, STS, HTS, and SXL, or
(b) are classified as moisture resistant and
flame retardant in Article 310 of the National Electrical
Code, such as those designated:
THW, TW, THWN, XHHW, MTS, or
(c) are flexible cords type SO, STO ST, SJO,
SJT, SJTO, SE, SEO, SJ, SJEO, SJTOO, or STOO listed in Article
400 of the National Electrical Code (see Table 6), or
(d) are conductors that meet the IEEE Standard
45, such as those designated:
R, B, T, V, AV, TA, M, S, or
(e) are conductors that meet the requirements
of UL Standard 1426.
Conductors for circuits of 50 volts or more
must comply with 183.435
Conductors, as purchased, often do not indicate
whether or not they conform with the above requirements and
standards. If the conductors or their packaging are not so
marked, then an alternate means of assurance of compliance
should be obtained. Certification of compliance by the wire
vendor is one acceptable means.
NOTE PERMITTED EXCEPTIONS 183.430(b)
TO COMPLY WITH THE LAW
- All conductors for use in circuits
of less than 50 volts meet 183.435,
or,
- Meet the requirements of SAE J1127
or SAE J1128 and the insulating material temperature
requirements of SAE Standard J378.
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