Archive for category: News & Stuff

Photo for the week of 11/6/2016

Categories: News & Stuff

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Found this in Lake Worth.                              Service Change!!!

Picture for this week 10/15/2016

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A week doesn’t go by without finding or receiving a great picture.

This is why we have licenses and inspections.

Panel NC

 

Till next time be safe

 

Jake

Always heard of this but never seen one.

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This weeks photo comes from our friend Todd down in Boca.

tuna j box

Thanks Todd

Do you see a problem?

Categories: News & Stuff

Another great installation!

 

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Sizing a service 230.90(A) Exception 3 and FBC Residential E3603.3.1 Exception.

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This weeks post comes from a couple of questions asked these past couple weeks about sizing a service.  I was asked why you have to add the breakers up to get the size of the main!  I told them to look at section 230.90(A) Ex.. #3in the NEC and in the Florida Building Code Residential E3603.3.1 exception.  This is not a new so I don’t understand how someone could come to the conclusion that the main “MUST” be based on adding up all the breakers in the panel or all the mains at a service.  The exception to this section allows us to size the main based on a calculation, and not by adding the breakers together, because if that was the correct way to size the main I would need 600 amps for the main in my home and my 2/0 wire would be way to small.  In the slides below there is a 400 ampere service with four 200 ampere mains, which to the layman would look like an 800 ampere service but in reality it is only a 400 ampere service, because the calculated load was only 340 amperes and we used 500 Kcmil Cu. wire which has an ampacity of 380 amperes at 75c which is good for a 400 amp service see 240.4(B).

 

230.90c

230.90b  

Hope this helps.

 

Jake

MR. LB

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A for effort

 

Till next time work safe be safe

 

Jake

PHOTO for this week 8/28/2016

Categories: News & Stuff

This weeks photo comes from West palm beach.  WOW!

 

hose clamps

Till next time work safe be safe

 

Jake

Photo of the week 7/31/2016

Categories: News & Stuff

Found this in Lake Worth owner paid to have someone install new cover.

 

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Till next time

 

Be safe work safe

 

Jake

Photo of the Week 7/17/2016

Categories: News & Stuff

This weeks photo comes from Lake Worth, I guess you would call this an alternate means and use of a method.

 

Acorn Clamp

Acorn Clamp a

Yes it was in a meter can!

 

Till next week work safe.

 

Jake

Photo of the week 7/10/2016

Categories: News & Stuff

This week photo is from Dan Matson.  Thanks Dan

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Till next week watch out where you shower!

 

Jake