Mystery Fuse

taxtaxJune 11, 2011

I've been trying to map-out the fuse-box by one-by-one removing them and then seeing where the power is cut.

However, there is one fuse which I can't seem to track down as to what it controls. Everything seems to be running fine so far. I'm wondering if there is anything I may have over-looked, or is it possible this is a redundant/extra fuse in the middle of my panel?

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kurto

It's certainly possible that there's a fuse without an associated circuit attached. Perhaps at one time there was a barn or garage that no longer exists?

    Bookmark   June 11, 2011 at 2:56PM
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taxtax

Hmm, well it's an old house and had more than one owner in the past. There certainly was no barn here since I'm in the city, but there has been some additions to the panel recently. I can see new additions were made due to an Air Conditioner install, also the main panel looks up-side down, I wonder if it was removed and then re-installed that way not too long ago to make things fit better for the extra AC boxes that were hooked up.

The plot seems to thicken though because I have a couple kitchen receptacles that don't turn off when I remove the fuses. I also seem to have another somewhere that never loses power. I probably missed something but I've done a double-check through the panel and have spent hours trying to track this down. I'm going to take a break probably until tomorrow or so before I try to one-by-one go through the hole panel all over AGAIN to track down why I cant cut off power to those outlets.

    Bookmark   June 11, 2011 at 3:22PM
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kurto

Pull the main fuse, and make sure the receptacles all lose power. It's unlikely, but very scary to think that you may have circuits without any over-current device. Any chance that there's a subpanel around supplying additional circuits?

    Bookmark   June 11, 2011 at 9:37PM
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taxtax

Hmm, there is a new grey box with two 30A breakers. No labels so I'm not so sure what it is for, but I guess I'm too worried at this time to do more probing around for the day, haha.

    Bookmark   June 11, 2011 at 10:19PM
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scottys

If you are comfortable in doing so, cut off the main switch then remove the front cover of the box. Look to see if a wire is actually attached to the screw for that fuse. This mystery fuse may have just have been a spare circuit with nothing attached to it and someone may have just screwed a fuse into the empty socket. If there is something attached to it and the ceiling is open such as in a basement, try and follow the cable. Another possibility is that it is for the motor on the oil burner which usually is a dedicated circuit even in older houses but one that you wouldnt necessarily think of while looking for outlets and lights upstairs.

    Bookmark   June 15, 2011 at 7:45AM
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jaysgarden

If you have to come to a message board to figure out what fuse controls what you should not be fiddling around within a 20 foot radius of any fuse box.

How can we possibly tell what your fuses are controlling?

Probably your neighbor is stealing power from you. Pull the fuse and watch your neighbors house.

Good luck and post when you have someone figure it out.

    Bookmark   June 17, 2011 at 2:18PM
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taxtax

I only posted because I was wondering if I had missed the obvious, such as a furnace issue, or other.

I have had the fuse removed ever since, hoping I"d stumble into something that does not work, and have an Ahah moment. But seems everything is still working as intended.

    Bookmark   June 17, 2011 at 2:54PM
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sombreuil_mongrel

I had a fuse that went to an unused transformer, maybe for the last generation doorbells.
Casey

    Bookmark   June 19, 2011 at 10:52AM
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