I'm confused about the UL listings required to comply with article 411. Article 411 states that system components must be listed. But in Mike Holt's low voltage book he states that no UL listing exists that complies with 411. He mentions that UL 2108 is being developed (6 years and waiting!) that will comply.
Doesn't UL 1838 comply with 411? If not, why not ? is it the 30V vs. the 15V issue?
I think theres a common belief that in order to comply with NEC code, transformers must be 15V or less. Is that correct?
Doesn't UL 1838 comply with 411? If not, why not ? is it the 30V vs. the 15V issue?
I think theres a common belief that in order to comply with NEC code, transformers must be 15V or less. Is that correct?