Dear All,

For a power supply being tested to meet Canadian requirements we were asked
to conduct a 40 A for 4 minutes earthing test because the power supply was
tested for oveload/shorts on a branch circuit of 20 A. Does this value of 40
A and time of 4 mins. make sense? I believe the requirement is derived from
CSA C22.2 No. 0.4 (Grounding and Bonding Equipment) - but I always thought
test is done at 30A for 2 minutes.

Any help would be greatly appreciated.

Peter Merguerian
Managing Director
Product Testing Division
I.T.L. (Product Testing) Ltd.
Hacharoshet 26, POB 211
Or Yehuda 60251, Israel

Tel: 972-3-5339022 Fax: 972-3-5339019
e-mail: pmerguer...@itl.co.il
website: http://www.itl.co.il 

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