ground mats in front of MV lineup

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durable corporation makes switchboard mat, comes in 25yd rolls 2',3',4' width. Want me to get you a cutsheet?
 
I have seen ground mats used in high voltage switchyard to create an equipotential zone while opening a manually operated disconnect (air break) switch. It reduces the touch potential to practically zero.
I seen some mv lineups that have it in the form of metal floors, but I have also seen mv lineups with the basic concrete floor also. I have seen no requirement for it, but it does make sense from a safety point of view when operating or racking in/out circuit breakers to be in the equipotential zone (bird-on-a-wire) when switching.
 
richxtlc said:
I have seen ground mats used in high voltage switchyard to create an equipotential zone while opening a manually operated disconnect (air break) switch. It reduces the touch potential to practically zero.
I seen some mv lineups that have it in the form of metal floors, but I have also seen mv lineups with the basic concrete floor also. I have seen no requirement for it, but it does make sense from a safety point of view when operating or racking in/out circuit breakers to be in the equipotential zone (bird-on-a-wire) when switching.
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The concrete floor has a ground grid (rebar in the floor) in it already so the equipotential zone already exists. The metal enclosure of the switchgear is bonded to building ground.
 
disregard what I posted, i was thinking rubber mats for the floor. Sorry -shouldnt have been posting late at night :/
 
weressl said:
The wording of the OP was confusing. Rubber mats are used front of switchegar, grounding mats would be under and all around not just front.
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i saw ground and front, and immediately thought of rubber insulating mats to put on the ground in front of the switchgear
 
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