Main wire size

[Joshua L. Frederick]

Correct size wire(s) for 200 amp breaker? Anyone have wire sizing chart? Thanks in advance.

[Brian A. MacNeish]

Originally Posted by jfrederick

Correct size wire(s) for 200 amp breaker? Anyone have wire sizing chart? Thanks in advance.

3/0 in Canada

[Robert Meier]

NEC, 200 amps=#2/0 Copper or #4/0 Aluminum, #2 cu=125 amps, all with some restrictions. Table 310.15(B)(6)-2008 NEC.

[Joshua L. Frederick]

Originally Posted by Robert Meier

NEC, 200 amps=#2/0 Copper or #4/0 Aluminum, #2 cu=125 amps, all with some restrictions. Table 310.15(B)(6)-2008 NEC.

So to answer my first question?? Is this 2/0 in the picture(s)?

[Robert Meier]

Looks like #2 Copper, from photo {2 AWG}.

[Joshua L. Frederick]

Originally Posted by Robert Meier

Looks like #2 Copper, from photo {2 AWG}.

Again I ask, Is this the correct wire size for 200 amp breaker and/or what is the difference between #2 and 2/0?? Thanks.

[Robert Meier]

Originally Posted by jfrederick

Again I ask, Is this the correct wire size for 200 amp breaker and/or what is the difference between #2 and 2/0?? Thanks.

Did you read post #3? The answer is no for 200 amps.

[Brian A. MacNeish]

Originally Posted by jfrederick

Again I ask, Is this the correct wire size for 200 amp breaker and/or what is the difference between #2 and 2/0?? Thanks.

2/0 (two naught) pronounced "two not" is a larger wire and will carry the 200 amps by your codes. #2 is good for up to 125 A depending its installation, configuration e.g. in open air, in a raceway, in a 3 wire cable, etc.

[Robert Meier]

Originally Posted by Brian A. MacNeish

2/0 (two naught) pronounced "two not" is a larger wire and will carry the 200 amps by your codes. #2 is good for up to 125 A depending its installation, configuration e.g. in open air, in a raceway, in a 3 wire cable, etc.

In the US wire sizes bigger than #1 go by zero's or aught (pronounced ought) a derivative of naught.

#1/0=0
#2/0=00
#3/0=000
#4/0=0000

After #4/0 the wire sizes start with their circular mil area in thousands.

[Brian A. MacNeish]

Originally Posted by Robert Meier

In the US wire sizes bigger than #1 go by zero's or aught (pronounced ought) a derivative of naught.

#1/0=0
#2/0=00
#3/0=000
#4/0=0000

After #4/0 the wire sizes start with their circular mil area in thousands.

I still say "naught" .........we keep dropping letters/words. Pretty soon we'll all be writing like our kids text language.....R U OK w/ that?

naught

   /nɔt/ Show Spelled[nawt] Show IPA
–noun 1. nothing.

2. a cipher (0); zero

[Robert Meier]

Originally Posted by Brian A. MacNeish

I still say "naught" .........we keep dropping letters/words. Pretty soon we'll all be talking like our kids text language.....R U OK w/ that?

naught

   /nɔt/ Show Spelled[nawt] Show IPA
–noun 1. nothing.

2. a cipher (0); zero

It's all good.

Go to the electrical supply house here and say "I need some three naught". First they look at you really funny then they say "you must be Canadian".

[Robert Ernst]

Wow and the whole time I thought it was "Ought".
aught or ought 2 (ɔːt) — n a less common word for nought

[Robert J. OConnor]

Originally Posted by Robert Meier

Go to the electrical supply house here and say "I need some three naught".

That would be like asking for "three goose egg" wire ... ... but maybe they would look at us just as funny if we went into a canuck supply house and asked for "three ought" wire ... they might say "dont ya mean ya want some three naught wire ... ehhhh" ... .

Originally Posted by jfrederick

Correct size wire(s) for 200 amp breaker? Anyone have wire sizing chart? Thanks in advance.

Get yourself a copy of Code Check, which has the attached table and a bunch of other usefull basic code info for HI's. With that table keep in mind that you can get more out of wires in conduit, and it doesn't necessarily apply to AC condenser circuits (check the nameplate for that).

.

[Brian A. MacNeish]

Originally Posted by rernst1

Wow and the whole time I thought it was "Ought".
aught or ought 2 (ɔːt) — n a less common word for nought

It probably is but I used 3 naught!