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(a) Scope. Open exposed wiring shall not be installed in any building or portion of a building except:
(1) In substations, transformer vaults, transformer enclosures, on the supply side of electric furnace electrodes, or in tunnels or similar locations, where such spaces are restricted to electrical use and are accessible to qualified and authorized persons only.
(2) For insulated conductors as permitted in Article 13; Temporary Wiring.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Renumbering and amendment of former Section 2420.17 to Section 2420.3 filed 8-27-86; effective thirtieth day thereafter (Register 86, No. 37). For prior history, see Registers 83, No. 45 and 81, No. 41.
2. Amendmentof article heading, section heading, subsection (a)(1) and Note filed 5-5-2008; operative 5-5-2008. Submitted to OAL for printing only pursuant to Labor Code 142.3(a)(3) (Register 2008, No. 19).
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