A new definition, lifted direct from the NEC style manual. On the face of it the words speak for themselves. The devil is in the details.
What, after all, constitutes “likely?” This definition attempts to elaborate by specifying “because of the failure of electrical insulation or electrical spacing.” Hmm.
Implied, but not specified, is failure because of a SINGLE failure. Unless, of course, we want to ban “double-insulated” tools. That, frankly, is more of a concern for equipment designers and listing agencies.
Left out of this definition concerns about electricity that is separate from the power supply to the item. That, again, is a matter for designers. Equipment must often be designed to dissipate static electricity or handle lightning strikes.
Has anyone here been part of a dispute over what should be bonded? Please tell us.
