Note my area either, but you are going to want to take a look at Europes
30 Amp ground continuity test. It is really designed to make sure of two
things. The resistance to ground is very small so that ground current
will flow when it has to, and that the ground path can withstand current
long enough to insure that a mains breaker pops.
Gary Mcinturff
-----Original Message-----
From: [email protected] [SMTP:[email protected]]
Sent: Monday, November 02, 1998 2:56 PM
To: [email protected]
Subject: Earthing at PWB for UL508 Power Supply
Dear Group,
Does anyone have experience with an Industrial Equipment (
UL508) having an earthing terminal (terminal block or the like)
directly on a trace on the PWB. As I understand, this is an
unacceptable construction for UL508 type equipment and there is
no alternative solution other than providing a dedicated
earthing
terminal on the chassis.
Note: In UL1950, an earthing terminal may terminate to a trace
on
the PWB if the circuit withstands a 1000 A short-circuit test.
Regards,
PETER S. MERGUERIAN
MANAGING DIRECTOR
PRODUCT TESTING DIVISION
I.T.L. (PRODUCT TESTING) LTD.
HACHAROSHET 26, P.O.B. 211
OR YEHUDA 60251, ISRAEL
TEL: 972-3-5339022
FAX: 972-3-5339019
E-MAIL: [email protected]
Visit our Website: http://www.itl.co.il
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