2 Aug
2001
2 Aug
'01
4:54 a.m.
At 01:19 PM 8/1/01 -0700, you wrote:
You have to look
at it from the viewpoint of the load.
For a receptacle, its wiring back to the box must be capable of
handling the maximum load that can be plugged into it.
For a lamp, or anything else plugged into a receptacle,
the wiring must be capable of handling the device load.
In the case of a lamp, 100W, 150W tops.
You could get the right/wrong adapters and plug a table saw into
the lamp socket, which would probably fry the zip cord if the saw
could draw enough juice to start in the first place.
From what I
understand, every conductor must be capable of carrying a
current greater than the breaker that protects it. Otherwise, the cord
would
be the first thing thing to fail in a overcurrent
situation. This would
present a very significant fire danger.
In the context of building wiring, yes. Not in the context of appliance
wiring. 22GA zip cord, such as found on US lamps, isn't capable of
sustaining 20A@115V without heating -- and you can certainly plug a 
2 Aug
2 Aug
12:24 p.m.
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1:19 p.m.
On Thu, 2 Aug 2001, Tony Duell wrote:
Yes, and what happens if there's a fault so the
device draws, say, 10A
(OK, not likely with a lamp, but possible with other things. Easily
possible). The fuse will not blow at 10A (it's rated at 15A), but zip
cord is going to get _very_ hot.
What happens?
The house burns down.
That's _exactly_ the problem. If somebody tried
that here (assuming the
fuse in the plug was the correct one -- 3A) ,the only result would be a
blown fuse. And not a cable on fire.
That might mean that you have far fewer of that sort of fires.
--
Grumpy Ol' Fred cisin(a)xenosoft.com
1:24 p.m.
On Thu, 2 Aug 2001, Tony Duell wrote:
I believe that's to what he was alluding.
This scenario is VERY against regulation.
Peace... Sridhar
Yes, and what happens if there's a fault so the
device draws, say, 10A
(OK, not likely with a lamp, but possible with other things. Easily
possible). The fuse will not blow at 10A (it's rated at 15A), but zip
cord is going to get _very_ hot.
You're assuming that the lamp is the only thing plugged into the
circuit.
You could get
the right/wrong adapters and plug a table saw into
You mean an adapter that fits in place of the bulb, yes? the lamp
socket, which would probably fry the zip cord if the saw
could draw enough juice to start in the first place.
That's _exactly_ the problem. If somebody tried that here (assuming the
fuse in the plug was the correct one -- 3A) ,the only result would be a
blown fuse. And not a cable on fire. -tony
2:05 p.m.
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