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3 Ph single conductors

D

Dave

Jan 1, 1970
0
The Electrical code says single conductor runs shall have 1 diameter spacing
between A,B,C.

What harm would be done if the runs are side by side with no spacing?

Thanks, Dave
 
S

SQLit

Jan 1, 1970
0
Dave said:
The Electrical code says single conductor runs shall have 1 diameter spacing
between A,B,C.

What harm would be done if the runs are side by side with no spacing?

Thanks, Dave

Are you speaking of overhead, in conduit or in cable trays and or ducts?
 
D

Dave

Jan 1, 1970
0
Repeating Rifle said:
I do not understand what you are asking. I am not an expert on code
practices. First you say single conductor and then you say A,B,C as if there
are three conductors.

Aside from any code considerations, running single conductors through metal
conduit does is not wise. The conduit will act as a shorted turn secondary
against the single conductor.

Bill

They are 500 mcm single conductor tech cable runs of a 3 ph 480 volt feed to
a MCC section. They are run up in a wooden ceiling strapped to 2x4's. I
believe the spacing is to reduce sheath currents due to the magnetic field
cutting through the aluminum armor.

Dave
 
S

SQLit

Jan 1, 1970
0
Dave said:
They are 500 mcm single conductor tech cable runs of a 3 ph 480 volt feed to
a MCC section. They are run up in a wooden ceiling strapped to 2x4's. I
believe the spacing is to reduce sheath currents due to the magnetic field
cutting through the aluminum armor.

Dave

From what I am reading/understanding, you need the help of a pro that is
local to you.
Strapping 500 MCM to an wood surface is an violation of everything good and
true that I know. Please call some one for an estimate locally.
 
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