Low voltage clearance

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Re: Low voltage clearance

110.26 is the Code reference. It requires 3' as the basic rule. 110.26(A)(1)(b) allows lesser clearance by special permission for low voltage AC and less than 60 vDC. It doesn't say how much less, just less.
 
Re: Low voltage clearance

This is for an industrial piece of equipment, does that matter? Presently, I am on site without my code book (lost to airline gremlin). Can you forward the verbage for 110.26(A)(1)(b)?
 
Re: Low voltage clearance

Originally posted by tmacdonald:
This is for an industrial piece of equipment, does that matter? Presently, I am on site without my code book (lost to airline gremlin). Can you forward the verbage for 110.26(A)(1)(b)?
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it does not matter what it is, the same basic rules apply.

however, telco and alarm boxes often violate these rules just because of where they have to be located. I think its why they allow for some leeway for lower voltages.

This rule is often ignored for things like small pushbutton stations as well, since they tend to get put where they will fit without worring too mucvh about the clear space rules. But these typically do not result in serious hazards so we don't fret too much about them, even if they are technically not "legel".
 
Re: Low voltage clearance

110.26(A)(1)(b) Low Voltage. By special permission, smaller working spaces shall be permitted where all uninsulated parts operate at not greater than 30 volts rms, 42 volts peak, or 60 volts dc.
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But look at this exception:

110.26(F) Dedicated Equipment Space. All switchboards, panelboards, distribution boards, and motor control centers shall be located in dedicated spaces and protected from damage.

Exception:Control equipment that by its very nature or because of other rules of the Code must be adjacent to or within sight of its operating machinery shall be permitted in those locations.
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