Can the operating handle of a Heavy Duty safety switch be padlocked in the ON or OFF position?
Provision to padlock the operating handle in the OFF position is standard on all Heavy Duty safety switches.
There are two methods to provide provisions to padlock the handle in the ON position (subject to local code regulations - consult local authorities for interpretation):
(1) As a factory option on most Heavy Duty safety switches, add suffix SPLO to the standard catalog number. This may be added to 30-1200 ampere, NEMA Types 1, 3R, 4/4X/5 stainless steel, 12 and 12K switches. This provision will allow the customer to use one 3/8" maximum hasp padlock to lock the switch in the ON position. Check the latest Square D Digest for the price adder.
(2) Modifying a switch in the field may be done to the 30 - 200 ampere, Series F switches, same NEMA types as above, and to our 400 - 1200A switches, Series E, all NEMA types. The lockplate on the side of the switch next to the handle has a very small indentation (a center punch) towards the top of the lockplate, which may be drilled out to accommodate a padlock. Note that drilling a hole in the steel of our painted devices will expose unpainted steel, which should be touched up with paint. Our gray paint is in a spray paint can, catalog number PK49SP.