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Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7103
Experience:  Proven Professional 46 years Experience
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I NEED TO RUN 4ea. #300 + 1ea. #4 IN CONDUIT FROM A

Customer Question

HEY THERE . I NEED TO RUN 4ea. #300 + 1ea. #4 IN CONDUIT FROM A TRANSFORMER TO A BREAKER PANEL IN CLASS 1 DIV 2 BUIDING . THE TRANSFORMER AND BREAKER ARE BOTH IN AN EXPLOSION PROOF BUILDING . MY ?'S ARE ,WHAT SIZE CONDUIT DO i NEED AND WHAT TYPE OF CONDUIT .
Submitted: 1 year ago.
Category: Electrical
Expert:  Mike G. replied 1 year ago.

Hi, I'm Mike G and I'll be glad to assist you. You'll need Galvanized Rigid Conduit.

Customer: replied 1 year ago.
what size conduit do we need to run 4ea 300 and 1ea #4
Expert:  Mike G. replied 1 year ago.

2 1/2"

Customer: replied 1 year ago.
WE CANT USE EMT OR LIQUID TIGHT FLEX.
Expert:  Mike G. replied 1 year ago.

Not in a Class 1 area.

Customer: replied 1 year ago.
I ALSO HAVE MY 12AWG WIRE THAT IS OPERATING MY 110 POWER AND 208 FOR MY AIR CONDITIONER . I HAVE 3 SECTIONS THAT ARE IN LIQUID TIGHT FLEX. AND MY MAIN BREAKER BOX IS NEMA 1 .
Expert:  Mike G. replied 1 year ago.

There is a very big difference between NEMA1 and Class! Div2. The later is a hazardouse area and GRC is required with explosion proof fittings.

Customer: replied 1 year ago.
WE ALSO HAVE A 75 KVU TRANSFORMER ON THE INSIDE OF THE BUILDING. DOES IT NEED TO BE CLASS 1 DIV 2 .
Customer: replied 1 year ago.
DO I HAVE TO WAIT 24 HRS . I JUST SEEN THIS NOTICE .
Expert:  Mike G. replied 1 year ago.

The transformer should be out of a Class 1 area.

Customer: replied 1 year ago.
THANK YOU
Expert:  Mike G. replied 1 year ago.

You're welcome

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