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Scope: As noted in Low Voltage Transformers – Part 1: General Requirements, UL 5085-1, or CSA C22.2 No. 66.1, Low Voltage Transformers – Part 1: General Requirements, the requirements in Part 3 cover Class 2 transformers for use with Class 2 circuits in accordance with the National Electrical Code, ANSI/NFPA 70, or the Canadian Electrical Code, Part I, CSA C22.1. They are intended for connection to essentially sinusoidal supply sources.

Advisory Note: For transformers intended for use in the United States, these requirements also cover Class 3 transformers for use with Class 3 circuits in accordance with the National Electrical Code, ANSI/NFPA 70, unless otherwise specified in this standard. See Annex D for Class 3 requirements.

In addition to the items specified in Clause 1.3 of Part 1, the requirements of Part 3 do not cover:
a) Power supplies (a transformer provided with a rectifier is considered a power supply);
b) Toy transformers;
c) Cord and plug connected transformers;
d) Direct plug-in transformers;
e) Transformers intended for use in audio, radio, or television type appliances; or
f) Other special types of transformers covered in requirements for other electrical devices or appliances. Advisory Note: The requirements of Part 3 do not cover transformers intended for use in the United States having a nominal primary rating of more than 600 V and transformers having overvoltage taps rated over 660 V.

Product Details

Edition:

1st

Published:

04/01/2006

ISBN(s):

1554362113

Number of Pages:

72

File Size:

1 file , 790 KB

Product Code(s):

2418013, 2418013