I am planning the wiring of an EMI chamber. We need 28VDC up to 30A in addition to the AC power. There will be an ungrounded conductor (+28), a grounded conductor, and an equipment grounding conductor. I want to have the receptacles along the base in divided metal raceway (G-4000). Does someone have a suggestion for a code compliant receptacle for this application? This is to be used for testing purposes. Other than the raceway wiring everything plugged in is temporary in nature. It can be a straight blade device, it doesn't need to lock.