Vault type switches and work clearance

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mshields

Senior Member
Location
Boston, MA
The work clearance per 110.26 for a 5kV switch is 5 feet (2400V to ground). What happens when you put that switch in an underground vault where the intent is to operate the switches via a hot stick from the relative safety of, standing in the open above the vault.

Do you, for example still need to have 5 feet of horizontal space from the front of the switch to other side of the vault? I would think that you'd want at least 5 feet of maneuverability anyway, but would still be interested in the letter of the law on this?

Thanks,

Mike
 
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