Meltric’s switch-rated plugs and receptacles offer significant advantages over pin and sleeve devices when it comes to protecting workers and simplifying NFPA 70E compliance.
Connecting or disconnecting a switch-rated plug or receptacle is a NFPA 70E defined “Normal Operation” and personal protective equipment is not required.
According to the 2018 NFPA 70E standard, Normal Operation of electrical equipment is permitted as long as:
The equipment is properly installed and maintained;
It is used in accordance with instructions included in the labeling and listing, and included in the manufacturer’s instructions;
Doors are closed and secured;
Covers are in place and secured;
And there is no evidence of impending failure;
As a result, when Meltric switch-rated plugs and receptacles are installed, workers can connect and disconnect welders, motors and other electrical equipment with plug-and-play simplicity.
In contrast, most pin-and-sleeve plugs and receptacles are not safe to connect or disconnect under load.
Before disconnecting a pin-and-sleeve plug workers should verify that it is de-energized.
This typically requires switching off power at a local disconnect and then verifying that power is actually off.
For example, according to the 70E standard voltage testing or opening hinged doors or covers to expose bare electrical conductors requires Arc Flash PPE.
And if, for example, the voltage is between 240 volt and 600 volt than NFPA 70E assigns an ‘Arc Flash PPE Category’ of 2.
In a third table, the 70E standard lists the requirements for Arc Flash PPE Category 2.
In summary, operating pin-and-sleeve plugs and receptacles typically requires verification of deenergization which necessitates qualified workers to wear PPE.
A far better solution is to utilize Meltric’s switch-rated plugs and receptacles. Operating them is a NFPA 70E defined “Normal Operation” that does not require PPE.
Looking to simplify NFPA 70E compliance?
Contact Meltric today.