Code Change Summary: A new code section was added to require warning signs at conductor access points for installations over 1000 volts.

A new code section now requires warning signs to be conspicuously posted at “points of access” to conductors in all conduit systems and cable systems. The “points of access” to conductors and cable systems are where the cables and conductors are terminated or can be accessed. This can be in a box, panelboard, switchgear and the like.

This new code section is in Part II of Article 300 which pertains only to installations over 1000 volts and does not apply generally to installations of 1000 volts or less.

Other than the warning label being conspicuous, the new requirement does not provide rules on the warning labels font, color or size since it applies generally to all points of conductor access which will vary between installations. The only thing that is consistent, is the warning label wording which must say: DANGER—HIGH VOLTAGE—KEEP OUT

Below is a preview of the NEC^®.  See the actual NEC^® text at NFPA.ORG for the complete code section. Once there, click on the “free access” tab and select the applicable year of NFPA 70 (National Electrical code).