Home>Discussions>ELECTRICAL & LIGHTING>Incoming main wire guage question
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DSmous
Incoming main wire guage question

We have a home in Northeastern Ohio which was built in 1948, which we bought two years ago.

It initially had a 60A service, with 3 individual bare wires from the pole to the weatherhead above the meter, with a 60A fuse box, and as in most homes like this 2 or 3 boxes attached to the main one...

When we bought the house, one of the requirements we added for us to purchase was to bring the electrical up to code...

The other day I was adding a bathroom fan, light and GFCI outlet, and ran a new breaker and wire. While in the box, I noticed the main feed is a 4 AWG wire. Is this up to code / adequate for home anymore?? Also, are the bare feed wires from the pole to the house up to code??

Supposedly, everything form the weatherhead to the panel was replaced. Thoughts?

canuk
Re: Incoming main wire guage question

That gauge you have from the meter to the panel is rated for 60 amp service --- that's it.
Around here the feed from the utility to the mast belongs to the utility --- it's their responcibility whether or not it's up to code.

canuk
Re: Incoming main wire guage question

Ah -- interesting ..... he says chomping down on some blubber :D

Ernie_Fergler
Re: Incoming main wire guage question
canuk wrote:

Ah -- interesting ..... he says chomping down on some blubber :D

Some say blubber tastes like chicken. Those same people say that about rattlesnake as well. Go figure......
Back to the OP, if your upgrade was for a 100 amp service and the conductor is copper, then #4 AWG is the proper size.:D
And yes in these parts the incoming service cable and the sizing of is installed and provided by your local power concern.

canuk
Re: Incoming main wire guage question
Quote:

Back to the OP, if your upgrade was for a 100 amp service and the conductor is copper, then #4 AWG is the proper size

Ernie --- you sure 4 AWG is ok for 100 amp service ?
As far as I know the ampacity is only around 80 for 4
AWG.

Maybe 3 --- for sure 2 AWG would be sufficient.

Yep --- can't believe that ... tastes like chicken " thing.;)

canuk
Re: Incoming main wire guage question

Ernie -- my apologies -- I keep forgeting about your NEC.;):cool:

We're not allowed to use 4 AWG for 100 amp --- no problem for 60 amps.

Ernie_Fergler
Re: Incoming main wire guage question
canuk wrote:

Ernie -- my apologies -- I keep forgeting about your NEC.;):cool:

We're not allowed to use 4 AWG for 100 amp --- no problem for 60 amps.

Never a problem.:D Not like it will ever become a flame war...
A question though. You post that #4 AWG is OK for 60 amps, but according to 230.79{C} Minimum 100 amp service required for a dwelling unit. Would you be talking about a 60 amp sub panel then?

canuk
Re: Incoming main wire guage question

It all started a long time ago ... in a galaxy far -- far -- away ....

When electrical devices were growing in popularity , the need for increased service supply grew to 60 amps. During that time, the utility was promoting this new fangled electric water heater to homeowners.

The utility owned this new fangled water heater and the homeowner would rent this. However, the utility had this new fangled device on a timer which was turned off during day time hours and back on during the times felt when the occupants would need it.

Anyway , it was felt the SEC needed to be increased to 4 gauge ( in part due to this new fangled electric water heater ) and became the standard for all 60 amp service. Later when the demands became greater and the need for 100 amp service, along came 3 gauge -- which lasted a brief time -- then changed to 2 gauge , which now remains the standard for 100 amp service.

JLMCDANIEL
Re: Incoming main wire guage question

Canuk is your standard based on CU or AL SE cable?
Jack

canuk
Re: Incoming main wire guage question

Jack --- CU.

This a local ammendament to the CEC and has been under discussion ( for quite sometime ) to change it to be more in line with CEC . Talk is they want to go back to #3 for 100 amp service. :rolleyes:

Ernie_Fergler
Re: Incoming main wire guage question
JLMCDANIEL wrote:

Canuk is your standard based on CU or AL SE cable?
Jack

Copper SE cable, dang, what is this world coming too? Here, above the Mason-Dixon line aluminum SE is the norm.:)

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