Shock Approach Boundaries (NFPA 70E Table 130.4)
Looks up the NFPA 70E Table 130.4 AC shock approach boundaries by nominal voltage: the limited approach (separate distances for an exposed movable conductor vs a fixed circuit part) and the restricted approach. Below 50 V no boundary is specified. Shock boundaries only (the arc-flash boundary is separate); the employer's safety program and 70E govern.
Formula and source
lookup by nominal phase-to-phase AC voltage band: limited approach (exposed movable conductor vs exposed fixed circuit part) and restricted approach; below 50 V no boundary is specified.
AC shock approach boundaries, NFPA 70E-2024 Table 130.4, by name.
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