Wiring portable cord

Note that in some portable equipment, only a two-wire ac cord is used to connect it to the mains supply. But the spacing requirement is still virtually unchanged, since a user can touch accessible parts on the secondary side and complete the connection through the earth ground. 

Although most portable electric tools have an equipment grounding conductor and many are double insulated, these methods are not foolproof. A grounding wire covdd break or a cord could become defective. Using a GFCI overcomes these insulation problems. 

J) Extension cord sets used with portable electric tools and appliances shall be of three-wire type and shall be designed for hard or extra-hard usage. Flexible cords used with temporary and portable lights shall be designed for hard or extra-hard usage. 

Employers must ensure that electrical wiring of plant and equipment complies with standards for electrical wiring in buildings, structures and prenuses, and that the use of portable electrical equipment and heaters in hazardous areas is as described in appropriate standards. Electrical cords or leads should carry a current tag indicating that they have recently been tested for safety. 

Single-voltage motors can have simplified wiring because the other connections are made internal to the motors. Portable mixers, especially those with single-phase motors, can be prewired with a suitable electric cord. 

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