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Old 07-04-2009, 05:09 AM
Paul Johnston Paul Johnston is offline
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Join Date: Jul 2008
Location: Costa Rica
Posts: 51
Re: An Electrician created this mess, why?
Quote:
Originally Posted by Jerry Peck View Post
Actually, there is - they are very easily defeated and bypassed by the old penny trick or wrapping with aluminum foil.

The NEC has, and for a very long time now, required replacement of overfused Edison base fuses by some other protection means. Basically if the Edison base fuse holder has evidence of overfusing, replacing with another Edison base fuse is prohibited.

Installing Edison base fuse holders is only permitted when they are made to accept Type S fuses by the installation of adapter.

Which all means that if there is evidence of overfusing one is not allowed to install even the correct size Edison base fuse for a replacement, but an adapter for Type S fuses may be screwed in and the Type S safety type fuses may be used.
What do you mean by the old penny trick? Yes people can circumvent the purpose of any safety devise like seat belts or anything. When I said nothing wrong with fuses I meant used properly.
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