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<br /> <br />Maximum System Operating <br />Voltagea <br />(V = Volts, kV = Kilovolts) Cranes & Equipment Doing Workb <br />Unqualified <br />Workersg, h <br />Operator <br />Requirements <br />Qualifiedc Qualifiedc - <br />Minimum <br />Safeguards <br />Proximity alarm, or <br />unqualified spotter, or <br />range control deviced <br />Mark <br />Boundarye, f <br />- <br />up to 750 V 10'-0'' 20'-0'' 10'-0" <br />up to 50 kV 10'-0'' 20'-0'' 10'-0" <br />69 kV 15'-0'' 20'-0'' 10'-9" <br />115 kV 15'-0'' 20'-0'' 12'-5" <br />138 kV 15'-0'' 20'-0'' 13'-3" <br />161 kV 15'-0'' 20'-0'' 14'-0" <br />230 kV 20'-0'' 20'-0'' 15'-5" <br />345 kV 20'-0'' 20'-0'' 20'-5" <br />500 kV 25'-0'' 50'-0'' 26'-9" <br /> <br />Table 1 Footnotes: <br />a Operating voltage may be AC or DC, phase-to-phase, or phase-to-ground. An unqualified worker is not <br />expected to be able to distinguish. <br />b Per OSHA Table A, 29 CFR 1926.1408. <br />c Must be qualified per OSHA 29 CFR 1926.1408(g). <br />d Must meet requirements per OSHA 29 CFR 1926.1407 and OSHA 29 CFR 1926.1408(b), use one of the <br />following: (1) a proximity alarm, (2) a dedicated spotter, (3) a device that automatically warns the operator <br />when to stop movement, such as a range control warning device, (4) a device that automatically limits range <br />of movement, set to prevent encroachment, or (5) an insulating link/device. <br />e Per OSHA 29 CFR 1926.1408(a)(2)(ii), and 1926.1409(a), use minimum controls boundary <br />f Per OSHA 29 CFR 1926.1408 (a)(1)(i), mark boundaries at or outside your MAD with items such as flags or <br />range limit/range control warning devices. The operator must not operate the crane beyond those boundaries. <br />g This includes any worker not in a vehicle, such as workers performing work on the ground, or on elevated <br />platforms or scaffolding. Includes allowance for worker’s reach and reach with conductive objects. <br />h Clearance values determined according to OSHA 1910.333(c)(3)(i)(A)(2).