Frequently Asked Questions

Frequently asked questions regarding NSS products, such as; what they are, what certifications they have achieved, common product specific questions, and more.

Why do you need a GFCI?

What is a GFCI?

Where is a GFCI Needed?

Why do you need an ELCI?

What is an ELCI?

Where is an ELCI needed?

Should You Get an ELCI?

What is the difference between a GFCI and ELCI?

GFCI

ELCI

Which one do you need?

What does a UL listing mean for you?

Who or what is UL?

Different UL Certifications

Why Buy UL Certified Products?

What is the NEC?

Is it Universal?

What Does it Cover?

Why Do I Need to Know NEC Guidelines?

What is the CSA?

Who Needs CSA Approval?

Different CSA Marks

Why Buy CSA Certified Products?

Class A Protection

What is Class A Protection?

Why do you need it?

Why does UL now require Class A protection?

Should I have Plug-In or Hardwired Appliances?

Plug-In

Hardwired

Which Is Better?

Auto or Manual Reset?

Auto Reset

Manual Reset

Specify to Equipment not a Panel

What is Nuisance Tripping?

What are Common Causes of Nuisance Tripping?

VFDs disrupting GFCIs

What is a VFD?

Why do GFCIs and VFDs have a resistive fit?