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Old 08-11-2010, 08:57 PM   #1
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Default Knob and tube
Let's say you have an old K&T system and are going to replace an old push button light switch. With no egc would you not worry about it?

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Old 08-11-2010, 08:59 PM   #2
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No problem.

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Old 08-11-2010, 09:11 PM   #3
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I would make sure and have some heat shrink with me. When you open up the box (if there is a box, I've seen it both ways) there is a good chance the wiring insulation will crumble off on something that old.

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Old 08-11-2010, 09:23 PM   #4
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Originally Posted by RIVETER
Welcome to the forum. We all need help from time to time. I asked a few days ago if there was a way to speed up the frequency of my heat pump defrost cycle. Do you know?
I don't know that answer I work on big units not residential. but I'll ask around and see if I can get you and answer. What brand unit?

Jim


Sure, just run out and buy a DTC Inverter and an induction motor. You can achieve 300% of the motors rated rpm's
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Old 08-11-2010, 10:48 PM   #5
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Originally Posted by RIVETER
Welcome to the forum. We all need help from time to time. I asked a few days ago if there was a way to speed up the frequency of my heat pump defrost cycle. Do you know?
I don't know that answer I work on big units not residential. but I'll ask around and see if I can get you and answer. What brand unit?

Jim


Sure, just run out and buy a DTC Inverter and an induction motor. You can achieve 300% of the motors rated rpm's
Huh, wtf
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Old 08-11-2010, 11:20 PM   #6
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I would make sure and have some heat shrink with me. When you open up the box (if there is a box, I've seen it both ways) there is a good chance the wiring insulation will crumble off on something that old.

Jim
On the old K&T I have seen plenty of lights with no box but never a switch without a box.
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Old 08-11-2010, 11:31 PM   #7
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On the old K&T I have seen plenty of lights with no box but never a switch without a box.
Switch replacements continue to be exempt from EGC requirements.
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Old 08-15-2010, 07:08 AM   #8
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On the old K&T I have seen plenty of lights with no box but never a switch without a box.
Old surface mount turn switches.
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Old 08-15-2010, 07:53 AM   #9
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Switch replacements continue to be exempt from EGC requirements.

I can't believe it took 7 posts for someone to say this........
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Old 08-15-2010, 07:20 PM   #10
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Old surface mount turn switches.
Good call my man. You are right, I've seen some of those from time to time.
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Old 08-15-2010, 08:10 PM   #11
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Switch replacements continue to be exempt from EGC requirements.
Well that's the answer I'm looking for. I honestly did not know it. I am not as smart as I seem.

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