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From: Rob Legg [SMTP:r...@potentia.ca]
Sent: Friday, May 18, 2001 8:49 AM
To: Richard Meyette; 'Tania Grant'; emc-p...@majordomo.ieee.org
Subject: RE: Disconnect Devices for Telecom Equipment
Group,
Continual reference to centralized DC
...@majordomo.ieee.org'
Subject: RE: Disconnect Devices for Telecom Equipment
Tania,
The -48V centralized DC power systems used in the central offices of
telecommunications companies are limited to 60 VDC or less under normal
operating conditions, including during charging of the batteries
...@majordomo.ieee.org'
Subject: RE: Disconnect Devices for Telecom Equipment
Tania,
The -48V centralized DC power systems used in the central offices of
telecommunications companies are limited to 60 VDC or less under normal
operating conditions, including during charging of the batteries, and are
therefore
[mailto:taniagr...@msn.com]
Sent: Wednesday, May 16, 2001 7:18 PM
To: Richard Meyette; 'emc-p...@majordomo.ieee.org'
Subject: Re: Disconnect Devices for Telecom Equipment
Rick,
A -48 volt source is considered a secondary circuit, but that does not
necessarily make it a SELV circuit. I also don't
Rick,
A -48 volt source is considered a secondary circuit, but that does not
necessarily make it a SELV circuit. I also don't believe that even if your
equipment installation should be proven to be powered by a SELV circuit that
the disconnect requirements of Section 2.6 do not apply. Here
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