Hi Ron:
> In the USA, NRTL safety approvals, thus NRTL safety marks, for equipment
> intended for the commercial
> environment, in fact, are required AND mandated through legislation. This
> requirement is found in
> the US's Code of Federal Regulations (29CFR Part 1910 Subpart S) and is
> regulated by the US Dept. of
> Labor (I'm not so sure about the requirements of products intended for the
> residential environment).
> With that being said, UL or other NRTL safety marks are also required,
> however, it is up to the
> manufacturer to decide which NRTL, therefore which NRTL mark, to use.
Be careful here.
1. NRTL "approval" is NOT mandated through
legislation (see points 3 and 4 below).
2. NRTL certification is NOT for equipment intended
for the commercial environment, but for equipment
intended for use by employees in the workplace.
3. 29 CFR Part 1910, Subpart S applies to employers,
not to equipment manufacturers.
4. Subpart S has two alternatives for employers:
a) employees may use equipment with an NRTL mark,
or
b) employees may use equipment the employer has
tested and found to be safe according to
various safety codes.
Clearly, the easy way for employers to comply is
to only buy and use equipment that has an NRTL
mark. (As manufacturers, it behooves us to obtain
the voluntary -- for us -- NRTL mark.)
5. Products intended for all other environments are
subject to the local electrical code, which
generally is the NEC, which invokes "listing."
As a general rule, NRTL certification satisfies
"listing" under the local electrical code.
Best regards,
Rich
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