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Electrical Codes, Standards, Recommended Practices and Regulations
book

Electrical Codes, Standards, Recommended Practices and Regulations

by Robert J. Alonzo
January 2010
Intermediate to advanced content levelIntermediate to advanced
512 pages
18h 35m
English
William Andrew
Content preview from Electrical Codes, Standards, Recommended Practices and Regulations
Thermoplastic
Flame-retardant, moisture-resistant
Flame-retardant, moisture and heat resistant
Flame-retardant and heat-resistant
Thermoset
Flame-retardant
Flame-retardant, heat-resistant
Thermoplastic and thermoset plastics encompass a large number of insulation classes in use
today with power and control conductors. They include insulation type letters MTW, RHH,
RHW, RHW-2, SIS, THHN, THHW, THW, THW-2, THWN, THWN-2, TW, XHH, XHHW,
and XHHW-2. The -2 suffix designation indicates the cable is permitted to be utilized at
a continuous 90
C (194
F) operating temperature in wet or dry conditions. Reference NEC
Table 310.13(A) for an explanation ...
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ISBN: 9780815520450