RBM wrote:
In the US they must have a UL label to be approved
wrote in message
...

Are these wall switches still legal to use?
They were real popular when I was a kid, and would like to put them in
my house. They are the old style push buttons.
See photo here.

http://www.rejuvenation.com/fixbshow...56f6a7724b 8a

Paul


This is a small point but in some cases it becomes important. No AHJ
can require you to use only UL listed equipment. They have to accept
the listing marks of other recognized electrical testing laboratories.
Some specialized and historic parts manufacturers turn to ETL and other
smaller labs to keep cost down on small production runs of unique items
but that does not make them unlawful to use. The applicable language
from the US NEC is
110.3 Examination, Identification, Installation, and Use of Equipment.
(A) Examination. In judging equipment, considerations such as the
following shall be evaluated:
(1) Suitability for installation and use in conformity with the
provisions of this Code
FPN:Suitability of equipment use may be identified by a description
marked on or provided with a product to identify the suitability of the
product for a specific purpose, environment, or application. Suitability
of equipment may be evidenced by listing or labeling.
(2) Mechanical strength and durability, including, for parts designed to
enclose and protect other equipment, the adequacy of the protection thus
provided
(3) Wire-bending and connection space
(4) Electrical insulation
(5) Heating effects under normal conditions of use and also under
abnormal conditions likely to arise in service
(6) Arcing effects
(7) Classification by type, size, voltage, current capacity, and
specific use
(8) Other factors that contribute to the practical safeguarding of
persons using or likely to come in contact with the equipment"

Notice that Underwriters laboratories is not mentioned by name The
reference to listing or labeling in the fine print note are not part of
the code itself and are therefore not enforceable as such and the
listing and labeling of one lab is a valid as any other for code
enforcement purposes.
--
Tom Horne
--
Tom Horne