There is no specific regulation that mandates the laying of insulating rubber mats in power distribution rooms, but according to some provisions in the "Safety Code for Electric Power Industry" (Substation and Power Plant Electrical Part), many electrical operations require standing on insulating rubber mats. For example: "When loading and unloading high-voltage fuses (fuse links), one should wear protective goggles and insulating gloves, and if necessary, use insulating clamps and stand on an insulating rubber mat or insulating platform." "When adjusting or cleaning brushes and slip rings on a rotating motor, it should be carried out by an experienced electrician, and the following regulations should be observed: stand on an insulating rubber mat (which is a permanent fixed insulating mat) during work, and do not touch both poles or one pole and the grounded part simultaneously, nor should two people work at the same time." "When it is necessary to work on the rotor resistance circuit of a rotating motor, the carbon brushes should be lifted first or the resistance should be completely removed. During work, gloves or tools with insulated handles should be worn, and insulating boots should be worn or one should stand on an insulating rubber mat." "When working on the secondary circuits of relay protection and instruments... during work, there must be a dedicated person to supervise, use insulated tools, and stand on an insulating rubber mat." "During the entire pressurization process of high-voltage tests, the staff should concentrate, not chat with others, and be alert to any abnormal phenomena at all times. The operator should stand on an insulating mat." For convenience, people have changed the practice of placing insulating rubber mats where needed to laying them permanently in places that frequently require them.
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