MELTRIC Switch-Rated Plugs & Receptacles

HVAC 'Quick Disconnect' Plugs & Receptacles

RTU power disconnect
Exhaust Fan power disconnect
Unit Heater quick disconnect
Portable Equipment cooling tower electrical connections

Safest and Easiest Way to Deenergize HVAC Equipment

When HVAC workers open and close standard blade-type disconnect switches, they are exposed to live parts and risk injury from an arc flash. To prevent exposure to dangerous arc flashes while simplifying code compliance, install UL/CSA switch-rated plugs and receptacles from MELTRIC. They are a combination plug, receptacle and disconnect switch in one device. MELTRIC's receptacles/connectors feature a built-in switching function that ensures the contacts are safely deenergized before the plug can be withdrawn. Once withdrawn, the plug provides visual verification of deenergization. Arc flash safety is ensured and HVAC service work becomes safer and easier.

disconnect switch plug and receptacle

Switch-Rated HVAC 'Quick Disconnect
Plugs & Receptacles

√ Switch ratings ensure safe load breaking/making –
    even in overload situations.

MELTRIC devices are switch-rated up to 200A & 60 hp, and provide short circuit make-and-withstand protection up to 100kA.

dead front simplifies NFPA 70E

√ Dead front design prevents exposure
    to live parts and arc flash hazards.

The need for arc flash protection boundaries and cumbersome PPE is eliminated. MELTRIC devices maintain a NFPA 70E 'hazard risk category' equal to zero.

√ Separation of the plug & receptacle provides
    verification of deenergization.

Voltage testing is not required. Visible contact separation proves the power is off.

plug and play motor connection

√ Plug & play simplicity allows any qualified     worker to quickly connect and disconnect     generators and other electrical equipment and other HVAC equipment.

Specially trained maintenance technicians are not required for load making/breaking. Downtime related to equipment change-outs can be reduced by up to 50%.

√ Lockout provisions facilitate easy compliance with
    lockout/tagout requirements.

lockout plug

Only a lock and tag are needed. No additional mechanisms are required. (Provisions are standard on the plug and optional on the receptacle.)

√ NEC, UL & CSA Compliance

In addition to their electrical plug & receptacle listings, MELTRIC Switch-Rated plugs & receptacles are UL/CSA listed for 'Branch Circuit Disconnect Switching' and 'Motor Circuit Disconnect Switching' per UL Subject 2682
'Switch Rated Plugs & Receptacles.'

Case Study

HVAC Quick Disconnect Plugs Facilitate Exhaust Fan Service Work

Many facilities have rooftop exhaust fans that require service and sometimes at the most inconvenient time. The NFPA 70E Standard for Electrical Safety in the Workplace requires the establishment of an electrically safe work condition at the fan before the service work is initiated. This includes properly interrupting the load current, visually verifying that all blades of the disconnecting device are open, and applying lockout/tagout devices.

Due to the potential exposure to live parts and arc flash during exhaust fan service work, an electrician must first deenergize the fan. Voltage testing is usually required to verify deenergization and since it potentially exposes workers to live parts, NFPA 70E requires workers to wear appropriate PPE.

Exhaust Fan plug and connector
"With the MELTRIC connector installed there is no need to physically mount a disconnect within sight for smaller motors on the roof so this is a good solution for us", said Monique Newell, a maintenance specialist at Scientific Protein Laboratories (SPL).

A better alternative to hardwired disconnect switches is MELTRIC's Switch-Rated plugs and receptacles which are used to connect power to electrical equipment. With MELTRIC devices installed, a technician can quickly and safely disconnect, repair or replace, and then reconnect exhaust fan motors. There is no need to climb up and down ladders to turn off remote disconnect switches, instead the MELTRIC device with an integral switching mechanism can be used to deenergize the fan. And there is no need to wear cumbersome PPE while deenergizing because the safety shutter on the receptacle prevents access to live parts and once the plug and receptacle are disconnected, they provide visual proof of equipment deenergization.