Minimum spacing between bus bars.

[rrzzan]

Table 408.56 gives information on minimum spacing between bare metal parts.

I have 600V systems and clearance between two bus bars is just 3/8 inch! (should have been 1 inch according to the code)

What could be the possible suggestion to overcome this?

Thanks for reading.

 

[mcgyvr]

There is an exception in 408.56 about distance may be less than the table at circuit breakers and switches and in listed components installed in switch/panel boards..

You can always use a proper insulation/barrier in those areas with reduced clearances also.

Those 2 bars are of opposite polarity correct?

 

[rrzzan]

Thanks mcgyvr,

What do you mean by "opposite polarity"?

There are three bus bars (from a 3 ph system) with clearance 3/8" between adj phases.

 

[davidbeach]

Space between bare parts or space between insulated parts?

 

[rrzzan]

Bare Parts.

 

[alehman]

ANSI/NEMA standards would typically require 1 inch for switchboards as well.