FTG Technical Tuesday – Proper grounding should always be used when running portable generators

FTG Technical Tuesday – Proper grounding should always be used when running portable generators: Generator systems must have proper grounding and bonding of all electrical components and transfer switches to minimize the possibility of uncommon current flow resulting in a power outage, damage to equipment and/or injuries to personnel. The importance of grounding and bonding circuits cannot be overstated. It is especially problematic with standby power systems as circuit breakers can trip, generators can drop offline, and important emergency and life safety loads can be lost due to hidden grounding problem(s) that could occur during a utility power outage, when standby power operation is vital.


Most mobile generators have a grounding rod (see diagram) supplied with the system should it be required. A qualified technician should be consulted to advise if the generator has to be grounded as a separately derived system, or can use the ground of the system being supplied through a solid neutral connection. Local codes should also be checked regarding the use of a ground rod, some local authorities having jurisdiction require such an accessory to be utilized by the operator. Call (855) 303-7900 or email nick@ftgequipment.com if you have a technical question.

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