Online Video

Back to Video Menu  
Grounding versus Bonding

PART II.

Sections

250.34 GeneratorsóPortable and Vehicle-Mounted

(A) Portable Generators. The frame of a portable generator isnít required to be grounded to the earth if: Figure 250Ė88

(1) The generator only supplies equipment or receptacles mounted on the generator, and

(2) The metal parts of the generator and the receptacle grounding terminal are bonded to the generator frame.

(B) Vehicle-Mounted Generators. The frame of a vehicle-mounted generator isnít required to be grounded to the earth if: Figure 250Ė89

(1) The generator frame is bonded to the vehicle frame,

(2) The generator only supplies equipment or receptacles mounted on the vehicle or generator, and

(3) The metal parts of the generator and the receptacle grounding terminal are bonded to the generator frame.

(C) Grounded Neutral Conductor Bonding. If the portable generator is a separately derived system (transfer switch opens the grounded neutral conductor), then the portable generator must be grounded and bonded in accordance with 250.30.

Authorís Comment: When a generator provides the sole power for a building or structure, itís a separately derived system even though no transfer switch is present.


VIEW VIDEO
[ Click Here to View ]    
REQUIRES

[ FREE ]
If you have already been approved for reprint permission, you may right mouse click on the link above and choose "Save Target As ..." or "Save Link As ..." to save the file to your local computer.
©2005 Mike Holt Enterprises, Inc.