Electrical Safety Quick Links
Job-Made Cords Overview
Job-made cords are considered by OSHA to be temporary wiring extensions of the branch circuit. The following special requirements apply:
- Job-made cord sets must be assembled by a qualified person.
- The completed assembly must be inspected by a qualified person before the cord set is used initially. The following checks and tests (or equivalent) should be performed:
- Determine that all equipment grounding conductors are electrically continuous.
- Test all equipment grounding conductors for electrical continuity.
- Determine that each equipment grounding conductor is connected to its proper terminal.
- Test each receptacle and attachment plug to ensure correct attachment of the equipment grounding conductor.
- The cords may be of a class less than that required for a permanent installation.
- Temporary installations are permitted during the period of construction, remodeling, maintenance, repair, or demolition of buildings, structures, and equipment or similar activities.
- Temporary installations must be removed immediately upon completion of the work for which the wiring was installed.
- Job-made cords are considered to be in compliance with OSHA standards (as opposed to listing by a nationally recognized testing laboratory for manufactured sets) provided they are assembled in a manner equivalent to those that are factory-assembled and approved. Criteria include:
- All components must be approved for the purpose of a nationally recognized testing laboratory.
- Individual components must be compatible for use with the other components of the completed assembly.
- The cord set must be marked appropriately with the manufacturer name or trademark, voltage, current, wattage, or other information as needed.
- Boxing (e.g. metal junction boxes) intended for use in a permanent installation may not be used.
- Connections to devices and fittings must provide strain relief.
- Cords passing through enclosures must be protected by bushings or fittings designed for the purpose. Fittings designed to fasten cables to metal boxes are not acceptable.
- Grounded conductor must not be attached to any terminal or lead so as to reverse designated polarity.