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#220962 09/10/20 07:13 AM
Joined: Sep 2020
Posts: 1
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My understanding is that metal cabinet needs to be grounded to the common or neutral 3 wire.

Questions:

When is 3 wire required and when 2?

Why are some plastic cabinets polarized 2 wire or 3 wire?

Why is this metal cabinet space heater that im try to fix, why its 2 wire and neither is common grounded to its metal cabinet?

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Joined: Apr 2002
Posts: 7,288
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Short answer is,

Metal enclosures are required to be 'bonded'.

NOT to the neutral conductor, except in MOCP equipment.

The other questions can be answered by you reading a book on basic electricity.

You may want to consult a Qualified Electrical Contractor regarding the space heater as you may be endangering yourself or your property by attempting to DIY.

I am closing this thread as the forum rules do not allow DIY.


John

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