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Old 04-05-2008, 04:27 PM   #1
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Wire guage


Anyone want to take an educated guess on the gauge of these service wires. The labels are painted over and I can't find any other markings. They measure approx. 11mm(insulation) in diameter with a caliper.
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Wire guage-serv2.jpg   Wire guage-serv1.jpg  


Last edited by jerryh3; 04-05-2008 at 06:58 PM.
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Old 04-05-2008, 07:49 PM   #2
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Wire guage


4/0 aluminum is about 11mm.
What size is the main breaker?

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Old 04-05-2008, 07:52 PM   #3
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The main is a 200. I'm only curious because I know this house had a smaller service panel at one time and only the panel was upgraded and not the drop or service entrance cable (hence the split bolts). Do you have the web page that table came from? wikipedia? I tried to find a table that stated that the insulation was part of the measurement, but I couldn't find one.
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Old 04-05-2008, 08:20 PM   #4
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11MM is about 7/16". That looks pretty old, the insulation could be fairly thick.

If it's 11MM overall (including insulation), my guess is between #4 and #1.

If just the conductor is 11MM, it's either a 3/0 or 4/0.

Rob
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Old 04-05-2008, 08:26 PM   #5
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Wire guage


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Originally Posted by micromind View Post
11MM is about 7/16". That looks pretty old, the insulation could be fairly thick.

If it's 11MM overall (including insulation), my guess is between #4 and #1.

If just the conductor is 11MM, it's either a 3/0 or 4/0.

Rob
The insulation really doesn't look that thick. It actually is molded on the wire strands. My guess was #2, but I really haven't dealt much with SE cables.
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Old 04-05-2008, 08:28 PM   #6
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Originally Posted by jerryh3 View Post
The insulation really doesn't look that thick. It actually is molded on the wire strands. My guess was #2, but I really haven't dealt much with SE cables.
I have seen that type of SE many times, IMO, it looks like #2, way to small to be 4/0. but i'm only looking at a picture.
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Old 04-05-2008, 09:09 PM   #7
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That panel has "Harry Homeowner" written all over it.
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Old 04-06-2008, 03:17 AM   #8
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That panel has "Harry Homeowner" written all over it.
You have no idea. You should see the rest of the panel.
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Old 04-06-2008, 05:06 AM   #9
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Wire guage


The way i look at it a i am more leaning to #2 SE conductors and the other quick give away is the large NM clamp size.

if you have 200 amp main breaker and you have #2 wire on there and don't have a extra breaker right below the meter then you will have some serious issue with this set up the wires will get overheated before the main breaker will trip.

if you want to keep the 200 amp breaker box my suggest is defered to the electrician they can able installed the correct cable between the breaker box and meter socket [ it may change along the way as well ]

the reason why i defered to the electrician due the SE cable between the main breaker and meter socket is hot all the time and UNFUSED so let you know a head up.

Merci,Marc
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Old 04-06-2008, 11:12 AM   #10
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Looks bad to me (master electrician). Have it checked by an electrical contractor (it's that easy).

-pete
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Old 04-06-2008, 02:46 PM   #11
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Wire guage


Most likely that's what I'll do. I'm debating a central air/furnace install and just trying to do some planning for the electrical needs. I have a 30 space panel right now which is full. I have two sub-panels (30A/50A) run out of that. A new service run should not be too bad. It's around 7 feet from the weatherhead to the meter and 4 feet from the meter to the main panel.

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