Bob,
The harmonized European EN60950 standard for safety of information
technology equipment (computers, etc.) in section 2.3 specifies the
following:
2.3.1 SELV CIRCUITS shall exhibit voltages safe to touch both under
normal operating conditions and after a single fault, such as break-
down of a layer of BASIC INSULATION or failure of a single component.
2.3.2 In a single SELV CIRCUIT or in interconnected SELV CIRCUITS,
the voltage between any two parts of the SELV CIRCUIT or CIRCUITS and,
for CLASS I Equipment, between any one such part and the equipment
protective earthing terminal, shall not exceed 42.4 V peak, or 60 V
dc, under normal operating conditions.
You might also want to check IEC 364 since the SELV definition differs
from the term SELV CIRCUIT as defined in IEC/EN60 950 standards.
Tania Grant, Octel Communications Corporation
______________________________ Reply Separator _________________________________
Subject: re: 24Vac
Author: Bob <[email protected]> at P_Internet_mail
List-Post: [email protected]
Date: 7/8/96 2:47 PM
Hello,
I am looking for any reference(most likely European) which stipulate
24Vac as a maximum touchable/safe voltage. I have found some references in
regards to 24Vac as a max. in wet or damp locations in mines and quarries(UK
regs.) but have been unsuccessful in finding this limit stipulated in regards
to electrical safety under normal conditions.
Regards,
Bob Brister
Digital Equip. Corporation
