Enter the characters you see below Sorry, we just portable generators under $200 to make sure you’re not a robot. Grounding Requirements for Portable Generators Portable generators are internal combustion engines used to generate electricity.
They are useful when temporary or remote power is needed, and are commonly used during cleanup and recovery efforts following disasters. Shocks and electrocution to utility workers from improper connection to structures, such as residences, offices, shops and trailers. Always plug electrical appliances and tools directly into the generator, using the appliance manufacturer’s supplied cords. Proper grounding and bonding are a means to prevent shocks and electrocutions. Do not connect a generator to a structure unless the generator has a properly installed transfer switch.
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Thus, rather than connect to a grounding electrode system, such as a driven ground rod, the generator’s frame replaces the grounding electrode. If these conditions do not exist, then a grounding electrode, such as a ground rod, is required. The transfer switch must be approved for the use and installed in accordance with the manufacturer’s installation instructions by a qualified electrician. Never use electrical tools or appliances with frayed cords, missing grounding prongs, or damaged or cracked housings. Use double-insulated tools and equipment distinctively marked as such, where possible. Verification by Testing The integrity of the connection between the generator’s frame and the equipment grounding terminals of power receptacles is important to the safe use of the equipment.
The connection may be confirmed via testing by a competent electrician with the correct equipment. The ohmic resistance should measure near zero and must not be intermittent, which indicates a loose connection. Bonding Versus Grounding Bonding and grounding are separate requirements for generators and other electrical distribution systems. Grounding means the connection, or the establishment of a connection, of an electric circuit or equipment to reference ground, which includes the generator’s frame. This is one in a series of informational fact sheets highlighting OSHA programs, policies or standards. It does not impose any new compliance requirements.