distance between boxes

[pwhite]

Hi all,

i do not have my code book at the jobsite today and a question has come up.
the clearance distance around a box rated 480 or less is 3 ft out from the box and a width of 3 ft for small boxes or if its a wide box, the doors must open a full
90 degrees as i understand it. the engineering team wants us to put another box within 18 inches of a breaker box. to me, you cannot work on both boxes at the same time and maintain the required boundary. they must be 3 ft apart.
am i correct in my thinking? if not please clarify the rules for me.
thanks in advance,
philip

 

[ptonsparky]

Side by side or facing each other?

 

[LarryFine]

Multiple enclosures may share space, meaning that the space allowances may overlap.

 

[infinity]

Is this a junction box? There is no working space required for junction boxes.

 

[pwhite]

side by side.
what is the rule for sharing the space.
philip

 

[jim dungar]

side by side.
what is the rule for sharing the space.
philip

There is no specific rule, but there is also no specific prohibition.

If sharing space was not allowed there would not be the requirement addressing the difference in the depth of adjacent equipment.

 

[LarryFine]

what is the rule for sharing the space.

Multiple enclosures may share space, meaning that the space allowances may overlap.

 

[infinity]

side by side.
what is the rule for sharing the space.
philip

There isn't any for boxes.

 

[pwhite]

To clarify,

i have a 200 amp breaker box next to a disconnect switch for a transformer.
philip

 

[infinity]

To clarify,

i have a 200 amp breaker box next to a disconnect switch for a transformer.
philip

Okay the terminology can change the answers. Technically your breaker box is a cabinet with a panelboard.

 

[kwired]

a box rated 480 or less

voltage to ground is a key factor in which minimum clear distance applies, though typical 480 volt systems all fall under the same 151-600 volt category.

If there is grounded surfaces or other electrical equipment behind you when facing said equipment the minimum clearance can change depending on what voltages are involved as well.

 

[Eddie702]

Isn't 277 to ground require 42"??