View Single Post
  #35   Report Post  
Posted to sci.electronics.repair
William Sommerwerck William Sommerwerck is offline
external usenet poster
 
Posts: 3,833
Default OT -- switching heating elements

"Jeffrey Angus" wrote in message
...

By the way, on page 3 of the users manual for the GE JBP64
it makes a couple of interesting statements.


1. Make sure you appliance is properly installed and GROUNDED.
2. Before performing any service, disconnect the range power
supply at the household distribution panel by removing the
fuse or switching off the circuit breaker.


But what I find really interesting...
"Do not attempt to repair or replace any part of your range
unless is specifically recommended in the manual. All other
servicing should be referred to a qualified technician."


I am an qualified technician -- despite what you might think.


Well, William, wanna give it another go at how you're the
victim here of a corporation's greed?


I'm not anybody's victim.


Remember, it ONLY takes ONE switch to OPEN a series circuit.
That is ALL that is required to control whether or not the
element gets hot or cools off.


You were not paying attention! Any heating device that uses both "phases"
requres TWO switches to open it.


Oh, and by the way, since you brought it up, the bit about
both of the 240 volt sources being "hot with respect to
neutral". The heating elements are connected ACROSS the 240
VAC source, NOT split with each half going from the two
sources to neutral. (That would require a double contact to
turn each PAIR of heating elements on and off.)


I'm not sure what you're talking about. First, there is no "240V" source in
my condo. There are multiple 120V sources from which you can get higher
voltages by spanning them. (I assume each voltage is referenced to some
"neutral" point.) In my preceding apartment, I took advantage of this to
build a break-out box -- all to code, I have several electrician friends who
advised me -- to provide individual lines for my class A power amps.

As someone else kindly pointed out, this oven has one side of its elements
hard-wired to AC. Bad, bad, bad, bad idea.