Dear Regulatory Experts,
I'm searching for a standard or guideline which will provide detailed 
information about the internal grounding and bonding of products, and I've had 
limited luck in finding anything suiting my purpose. Reviewing a few CSA and UL 
standards hasn't been helpful.

Specifically, I am interested in Class I plug and cord connected products, 
which require the internal grounding wire to be secured to a metal, non-current 
carrying enclosure. I need to know what kinds of screw/nut/washer combinations 
are acceptable, mainly from a North American viewpoint, but not excluding 
Europe.(As usual, I'm working with small industrial-type battery chargers 
drawing less than 12A at 120V, 6A at 240V).

I'm particularly interested in requirements/acceptability of thread-cutting or 
-forming screws, with or without locking washers. I'm wondering about their 
securement performance over time.

The standards I've reviewed so far seem to be very non-specific about 
requirements, while specifying some testing. Are there any documents out there 
that are more detailed?

Thanks in Advance,
Brian C.

Brian Ceresney, CTech.
Regulatory Team Lead,
Delta-Q Technologies Corp.
3755 Willingdon Ave.,
Burnaby, BC  Canada  V5G 3H3
Tel: 604-566-8827
www.delta-q.com<http://www.delta-q.com/>
bceres...@delta-q.com<mailto:bceres...@delta-q.com>


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