FAQ

Material taken from the National Electric Code

is reprinted with permission

from NFPA 70

, 2023 edition. National Electrical Code

NEC

Text

New

409.70 Surge Protection for Safety

Circuits in Industrial Control Panels

Change Summary

• New section calls for surge protection of safety circuits

within control panels.

Article 409 Industrial Control Panels

409.70 Surge Protection. Safety circuits for personnel

protection that are subject to damage from surge events

shall have surge protection installed within or immediately

adjacent to the control panel.

Expert Analysis

A new section has been added to clarify that surge

protection shall be installed within or immediately

adjacent to the control panel to protect safety circuits

for personnel protection. The surge protective devices

address a documented safety issue that has been

reported by the Electrical Safety Foundation.

Leviton Solution

51120-1

Type 2 Single Phase Surge Panel with 4-Mode Protection

120/240V Single Phase Panel Mount

Surge Protective Device, 4-Mode

Protection, 50kA Max Surge Current

Rating, NEMA 1 Enclosure, UL 1449

4th Edition Type 2.

Leviton’s Surge Protection Devices

can be used individually or as part of

a coordinated application strategy,

to protect sensitive electronic

equipment, in industrial, commercial

and residential locations, from the

stress and degradation inﬂicted by

voltage transients. Transients are

diverted away from sensitive micro circuitry, providing protection

against catastrophic failure, costly downtime and data disruptions.