ARE YOU READY FOR CHANGES TO THE ELECTRICAL CODE TAKING EFFECT SEPTEMBER 2026?
In food and beverage processing, the combination of a wet environment, stainless steel equipment and conductive surfaces creates a situation where shock is more likely to occur. The NEC 210.8[B] code requires GFCI (ground fault circuit interrupter) protection for any plug and cord equipment that is 208 V, 3-phase and 100 A or below. The Shock Block SB5000 series does just that.
It will now be mandatory for you to be compliant with:
Article 210.8 (A) Dwelling Units – Mandates Class A Ground Fault Circuit Interrupter protection for all 125V to 250V receptacles supplied from branch circuits under 150V to ground per hot leg.
Article 210.8 (B) Non-Dwelling Units – Mandates Class A protection for all 125V to 250V receptacles supplied from single phase circuits rated up to 50 amps, and three phase circuits rated up to 100 amps.

The Industrial Shock Block SB5000 series is a personnel protection device designed to meet the requirements for GFCIs and special-purpose GFCIs defined by UL 943 and UL 943C, and protects personnel from electrical shock where standard GFCI breakers and receptacles are not available.
FEATURES
- UL 943 inverse time trip curve
- DFT (Discrete Fourier Transform) filtering algorithm
- Minimum trip time <20 msec
- Fixed 6 mA (UL 943) or 20 mA (UL 943C) trip level
- UL 943 inverse time trip curve
- DFT (Discrete Fourier Transform) filtering algorithm
- Minimum trip time <20 msec
- Fixed 6 mA (UL 943) or 20 mA (UL 943C) trip level
- Selectable trip levels 6–100 mA
- Two-stage ground monitor with Zener termination that meets UL 943C, CSA M421
- Flexible configuration
- Conformal coating
- Auxiliary contact
- Automatic self-test
Littelfuse SB5000 Series Datasheet
National Fuse is an authorized distributor of Littelfuse Shock Block products. We invite you to look at the various Shock Blocks available and give us a call at (440) 356-8181 or (800) 328-0496 or email ShockBlock@nationalfuse.com, or fill out the form below and we will fit the right Shock Block for your company needs.
National Fuse Products is your partner in compliance. The electrical code changes September 2026, so don’t wait until its too late!
