Can any Square D Fusible safety switch(heavy duty, general duty or double throw) be field converted to a non-fusible switch OR can a non-fusible be converted to a fusible switch?
Heavy Duty Safety Switches
Converting fusible to non-fusible or non-fusible to fusible
No, neither conversion can be done. Converting a switch would be considered a violation of the NEC Article # 110.3(B) and the UL Listing. Also, the switch`s labeling would be incorrect.
NOTE: This would also apply to ANY Square D Canadian safety switches(heavy duty, general duty or double throw) it would violate the CSA listing and CEC(Canadian Electrical Code) and switches labeling would be incorrect.