Hi Bill: State laws haven't cleaned up their text in all cases, and quite often, the rhetoric used to describe safety approvals, still uses "UL" when NRTL is meant. No. I have been trying to say that "NRTL" is not universal certification that is accepted in all jurisdictions. (UL is accepted in all jurisdictions.) "NRTL" is NOT the correct general description for certification required by electrical codes. The correct term is "certification." Certification is required by the various electrical codes in almost all jurisdictions. Some jurisdictions accept certification by all NRTLs, and some do not. Furthermore, some states have state electrical codes (laws), but other states do not. Each state is different, with some having state electrical codes, some having county electrical codes, and some having city electrical codes. I know of no movement for jurisdictions to "clean up their text" to defer to OSHA's NRTL program for acceptance of certification labs. We should not generalize that NRTL certification is the one-size-fits-all certification. The State of California has a state electrical code. The code provides for cities and counties to supersede the state code with a local code, hence the City of Los Angeles code trumps the state code. The state requires NRTL certification, but the city has its own lab list, which includes some but not all NRTLs. Under electrical codes, NRTL certification is NOT one-size-fits-all. Best regards, Rich
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