Distance between guardrail and electrical box
Your guard (guardrail) must block certain sphere sizes through any opening: The space between posts (such as cables, rods, or panels) must block a 4-inch diameter sphere. Working space: The front clearance, side clearance, and height clearance requirements for electrical equipment that provide a safe area for maintenance, inspections, and other work. When you're installing cable railing on a deck, staircase, or balcony, the safest (and simplest) path is to build exactly to code. Appendix B to Subpart M of Part 1926 - Guardrail Systems Non-Mandatory Guidelines for Complying with § 1926. Electrical clearances are the minimum separation distances the National Electrical Code (NEC) requires between wiring, panels, overhead conductors. The guard-rail is necessary and mandatory when fall risk from height higher than 500 mm is present, or if the distance between the walking platform and a neighbouring structure (machinery or wall) is greater than 180 mm.
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