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Fuse blower plug? #220139 07/20/19 05:02 PM
Joined: Jul 2019
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SPSchuman Offline OP
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Someone suggested this plug, with its loop of wire, was designed specifically to blow a fuse so you'd know which circuit the outlet was on. Does that sound right? Could it have served any other purpose?

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Re: Fuse blower plug? [Re: SPSchuman] #220140 07/22/19 07:56 AM
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IanR Offline
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Well, while it may not sound right, it sure sounds believable. There is never seems to be any shortage of Darwin Award contestants. I can't really think of any other use. Perhaps a warped idea of safety protection. Bolt the circuit you are working on, in case someone else energizes it?

Re: Fuse blower plug? [Re: SPSchuman] #220141 07/22/19 08:14 AM
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Posts: 198
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geoff in UK Offline
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Perhaps for a testing purpose? e.g. Identifying unconnected neutrals to pair off with corresponding lives when wiring a distribution board?

Re: Fuse blower plug? [Re: SPSchuman] #220142 07/23/19 01:18 AM
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gfretwell Online Content
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I am surprised the prongs on the plug are not more burned. I am thinking this is a joke. It certainly was not used much.

OTOH if it was a safety thing, sort of a fail safe LOTO, that might make sense. The guy replacing the fuse might be surprised tho.


Greg Fretwell
Re: Fuse blower plug? [Re: SPSchuman] #220147 07/26/19 11:06 AM
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Hemingray Offline
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This looks more like it may be used for a remote switch application: The other terminal on there probably goes out to the corresponding female pin on the other side. With this you'd take a switch of any properly rated type, some lamp cord, and make a tabletop lamp switch or similar.

Why someone did it this way, I will never know.

Last edited by Hemingray; 07/26/19 11:06 AM. Reason: Forgot a part

Cliff
Re: Fuse blower plug? [Re: Hemingray] #220148 07/26/19 04:23 PM
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emolatur Offline
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Originally Posted by gfretwell
OTOH if it was a safety thing, sort of a fail safe LOTO, that might make sense. The guy replacing the fuse might be surprised tho.


... when I first started, I did something like this. I was so paranoid of making a mistake that I had a multiple-stage test before working on anything. The final stage was to dead short it, first to verify the power was off and second to make sure it stayed that way.



Originally Posted by Hemingray
This looks more like it may be used for a remote switch application: The other terminal on there probably goes out to the corresponding female pin on the other side.


I believe this is the correct answer.

Re: Fuse blower plug? [Re: SPSchuman] #220152 07/29/19 01:40 PM
Joined: Apr 2002
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HotLine1 Offline
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The center screw might have been a ground (EGC) ?

Perhaps it is steup to 'ring out' non-energized circuits. ie: one prong shorted to ground??

Has anyone done a continuity check? What is the center screw attached to on the receptacle side? Looks like the 'hole' the wire is poked thru could have been a ground! Or am I dreaming ??


John
Re: Fuse blower plug? [Re: SPSchuman] #220158 07/31/19 10:24 AM
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SPSchuman Offline OP
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Thanks for your suggestions. The plug is on its way to the Digital Museum of Plugs and Sockets (so I can't perform any tests on it).

Re: Fuse blower plug? [Re: SPSchuman] #220169 08/02/19 02:20 AM
Joined: Jul 2002
Posts: 8,262
Trumpy Offline
Member
I have the New Zealand version of this plug in my toolbox.
We call it an interrupted phase tap-on plug.
The pin that plugs into the wall is connected via that wire to the other side (where you plug an appliance into).
This allows you to measure the current flow through the appliance.

I hope this makes sense.

Re: Fuse blower plug? [Re: SPSchuman] #220171 08/02/19 01:44 PM
Joined: Apr 2002
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HotLine1 Offline
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Ah...you put an Amprobe on the wire!!!


John
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