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#329 - 01/16/01 09:57 AM Confirming properly grounded equipment
Harold Best Offline
Junior Member
Registered: 01/16/01
Posts: 2
Loc: Danville, KY, USA
I work in the safety department and we utilize a new equipment checklist for any new or altered equipment. One of the items on the checklist deals with the proper grounding of equipment. I have asked various electrical contractors to confirm that the equipment they have installed is properly grounded before I complete the checklist. Does anybody have any suggestions at to the best way to confirm that the equipment is properly grounded? What type of confirmation test should we require?
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#330 - 01/16/01 12:45 PM Re: Confirming properly grounded equipment
sparky Offline
Member
Registered: 10/18/00
Posts: 5303
Harold;
the grounding requirements of article 250 in the NEC are many times pertinent to specific equipment. So you may need an answer for each individual situation.
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#331 - 01/16/01 01:50 PM Re: Confirming properly grounded equipment
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
Harold,

Perhaps if you gave us more details on the types of equipment you are dealing with We would be better able to offer suggestions.


Cord and plug connected? - if so, are you referring to the grounding of the equipment itself or the circuit it is connected to?

What type of location is this equipment installed in? is it a Hazardous Location?
more details might help.

Bill
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#332 - 01/16/01 02:02 PM Re: Confirming properly grounded equipment
Harold Best Offline
Junior Member
Registered: 01/16/01
Posts: 2
Loc: Danville, KY, USA
Quote:
Originally posted by Bill Addiss:
Harold,

Perhaps if you gave us more details on the types of equipment you are dealing with We would be better able to offer suggestions.


Cord and plug connected? - if so, are you referring to the grounding of the equipment itself or the circuit it is connected to?

What type of location is this equipment installed in? is it a Hazardous Location?
more details might help.

Bill


This checklist is used for any new or altered equipment. The most recent items I have used the checklist on include: cardboard baler, dock locks, Landringer (puts plastic wrap around loads on pallets), production auxillary equipment, etc.

I assume you just have to look at the specific equipment and determine how the grounding should be confirmed (i.e. test with meter, etc.).
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#333 - 02/11/01 11:54 PM Re: Confirming properly grounded equipment
BR Offline
Junior Member
Registered: 02/12/01
Posts: 1
Loc: USA
The equipment installation should be inspected to meet the requirements of NEC 250. "Checking with a meter" will not tell you much if you use a multimeter. The ohmmeter section will only measure resistance, not impedance. You need to use an impedance tester such as a Tasco Inspector, ECCOS, Suretest, or GLIT if you want to measure inpedance.
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#334 - 02/13/01 04:40 PM Re: Confirming properly grounded equipment
sparky Offline
Member
Registered: 10/18/00
Posts: 5303
BR;
May i ask which impedance tester you would recommend? I am in the market for one....
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