30A Isolated Ground Locking Receptacle
306RIG
All Marinco IG devices are orange, with an orange triangle-indicating
isolated ground. Equipment requiring an isolated ground should use an
isolated ground plug (orange housing) to show that the equipment should
be connected to an isolated ground receptacle. Conventional receptacles
have grounding contacts that are connected to the box, fittings,
conduit and all other building ground system components, which can act
as a large antenna for EMI and RFI. The ground terminals on Marinco
IG-receptacles are designed to directly connect only to the service
entrance grounding system, per NEC Article 250.146(D).
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