Hi Richard, You raised this point (some additional thoughts of mine follow): >Let me take this opportunity to present another point for anyone who >cares to give it some thought. > >The NEC and/or local electrical requirements come into play because the >product connects to the local electrical supply. > >What about battery operated products ? Is there then nothing that says >that a battery operated product needs any third-party safety approvals ? I would also ask, what if it connects to a telecommunications network? In my travels, I've come across some people that have said that "All you need is an external Listed power supply and there's no need (safety-wise) to do anything else, even if the product does connect to the PSTN." I have responded by saying that the NEC (based on 800-4) requires products to be Listed that connect to a telecommunications network. Does this argument from these people have any merit? Do battery powered products that connect to a telecommunications network need to be, in fact, Listed? Also, as described in the NEC, does the term "telecommunications network" refer to only public networks? Comments? Best regards, Ron Pickard [email protected]
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