ordomo.ieee.org>
Subject: EN60950 (UL1950, IEC 60950) On off switch marking.
Date: Fri, 27 Apr 2001 10:25:19 -0600
Hi All,
When a switch opens only one leg of the mains to control power to
equipment should it be marked with the l and O?
Background:
Three different engineers from thr
I've worked on products which used triple phase
inputs for different sections of the product and
the main power ON/OFF breakers were usually barred
together as one gang switch. I also had off from
one of those phases a motor which had it's own
ON/OFF switch. And all the switches were
- Original Message -
From: Luiz Claudio luizboni...@ig.com.br
To: Rick Linford rlinf...@sonicwall.com
Sent: Sunday, April 29, 2001 9:01 AM
Subject: Re: EN60950 (UL1950, IEC 60950) On off switch marking.
Rick,
I will give my oppinion, based on the experience that I have dealing
, IEC 60950) On off switch marking.
Hi,
If the switch is being used as the disconnect device it needs to
disconnect
both poles simultaneously (2.6.6). 1.7.8.3 only refers to on and off
indications of the equipment.
So I guess I need to know if the switch is being used as a disconnect or
just to turn
Hi,
If the switch is being used as the disconnect device it needs to disconnect
both poles simultaneously (2.6.6). 1.7.8.3 only refers to on and off
indications of the equipment.
So I guess I need to know if the switch is being used as a disconnect or
just to turn the machine on and off.
Scott
Hi Rick:
There are three issues which we must address:
1. The safety function of the switch.
2. The safety function of all-pole disconnect
versus one-pole disconnect.
3. The marking of the function of the switch.
*
The safety function of a disconnect device (for
which a
...@sonicwall.com]
Sent: Friday, April 27, 2001 12:25 PM
To: emc-p...@majordomo.ieee.org
Subject: EN60950 (UL1950, IEC 60950) On off switch marking.
Hi All,
When a switch opens only one leg of the mains to control
To: emc-p...@majordomo.ieee.org
Subject: EN60950 (UL1950, IEC 60950) On off switch marking.
Hi All,
When a switch opens only one leg of the mains to control power to
equipment should it be marked with the l and O?
Background:
Three different
...@lexmark.com]
Sent: Friday, April 27, 2001 12:47 PM
To: Rick Linford
Cc: emc-p...@majordomo.ieee.org
Subject: Re: EN60950 (UL1950, IEC 60950) On off switch marking.
Rick,
My opinion based on my understanding of IEC 60950.
Whether an on/off switch breaks one or both sides of the line
%majordomo.ieee@interlock.lexmark.com
cc:(bcc: George Alspaugh/Lex/Lexmark)
Subject: EN60950 (UL1950, IEC 60950) On off switch marking.
Hi All,
When a switch opens only one leg of the mains to control power to
equipment should it be marked with the l and O?
Background:
Three different engineers
Hi All,
When a switch opens only one leg of the mains to control power to
equipment should it be marked with the l and O?
Background:
Three different engineers from three different NRTLs indicated it is
permitted, two even required it. A different engineer for one of the
NRTLs and two other
11 matches
Mail list logo
