Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
¿ªÔÆÌåÓýJim ?yes mostly ?? I guess you are responding to? ?Same sort of goes for radios of old. ?I blame the NEC++ ?for allowing a? 0.35 amp radio to be *protected* by the 15 amp house fuse ? ? Quibbling ?¡. ¡°to the outlet³§¡± I support the good practice to ??¡°add a fuse to a consumer radio¡± but going back to NEC code you need to fuse every time you reduce wire size/rating unless upstream protects it too. ?But plug-in stuff has been immune from the NEC ideas, but they still get ULs blessing somehow .? A wired in transformer must be fused, but a plug transformer ..your handy powerstat doesn¡¯t . I say it is all in the business politics of who sits on the board/ committee etc. but I should not start that here.? Seems to me fusing in Britain is more sensible.. in that way ? From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Friday, July 12, 2024 3:30 AM To: [email protected] Subject: Re: [HallicraftersRadios] HT-37 transformer failure due to rapid STBY-->OFF-->STBY ? Don Whatever is used as a circuit protection device, it is there to protect the hidden wiring from the distribution panel where the fuse or circuit breaker is located to the outlet, it is not used to protect the load.? It is good practice to add a fuse to a consumer radio when it is in for repair but few appliances have such protection.?? ? I believe that our vacuum cleaner has a thermal circuit breaker.? Not sure about the microwave oven or the fridge but they are both close to the 15 amp rating of outlets protected by 15 amp circuit breakers.? I live in Hot Springs, Arkansas.? The local electric code does not allow for anything smaller then 12 AWG wire so the smallest circuit breaker allowed is 20 amps. Regards. Jim ?? -- don??? va3drl |
don Root