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Frequently Asked Questions (FAQ)

The following are answers to common questions. If you have a question that you do not see listed below, please do not hesitate to contact us by calling 800-780-4324 x311

You may also Ask a Question online. And we might add your question to this list.

[+] Click on the questions below to reveal the answers.


What is a GFCI?

A GFCI is an electronic device for protecting people from serious injury due to electric shock.  The GFCI senses an imbalance between the hot and neutral circuits.  If the difference between the circuits exceeds a pre-determined level, the GFCI disconnects both the hot and the neutral lines.  Portable GFCI's are designed to trip when the ground fault circuit current exceeds between 4-6 milliamps.

TRC's portable GFCIs have grounded neutral protection and open neutral protection.  They also can provide protection for two, three or four wire circuits; transient voltage protection for internal and load circuits; provide protection in reversed polarity of input line and neutral; lighted and/or mechanical trip indicator.

TRC GFCI's are available as User Attachables, In-line Cord Sets, Plug & Cord Sets, Adapters, Tri-Cords, Quad Boxes, Panel Mounts, Specialty Devices, and Outlet Tester.


If a product has a three-prong grounding type plug, is a GFCI still necessary?

GFCI's are necessary even if the product has a third wire to ground it. GFCI's provide very sensitive protection to consumers against electric shock hazards. In a number of conditions, a shock hazard could still exist even if a product has a grounding wire. 


What are the minimum and maximum volts and amps of TRC's portable GFCI's?

TRC's portable GFCI's are available from 120V/15A to 600V/80A.


Are GFCI's required on construction sites?

Yes, the 1999 National Electrical Code additionally requires that all 120 volt, single-phase, 30 ampere receptacle outlets on construction sites shall have approved ground fault circuit interrupters for personnel protection.


Are TRC's Test/Reset buttons mounted flush?

No, by mounting the buttons flush with the cover they are easily bumped resulting in undesired tripping or resetting.


Why does TRC use Latch-up Contact Mechanism?

Contacts are set with 300 times more force with the manual latching. This reduces the risk of contact welding.


What is the difference between Manual Reset and Auto Reset?

Manual resetting forces the testing of the GFCI and avoids unexpected restarts when power returns.

Auto reset was designed for the spa applications of GFCI's to avoid freezing of the tub and customer complaints of a cold tub when power is lost. This design is exceptionally dangerous for construction applications where an unexpected return of power could and has caused serious accidents.


What about TRC's engineering support?

With over 200 years of combined engineering experience, TRC is unmatched in their ability to respond to customer needs and to design superior products.


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