Section SPS 316.450 - Transformers and transformer vaults (including secondary ties)(1) OVERCURRENT PROTECTION. This is a department rule in addition to the requirements in 2011 and 2017 NEC Table 450.3 (A) Note 3: The qualified person shall be either an employee at that location or an employee contracted for this purpose who is readily available.(2) LOCATION. Substitute the following wording for 2011 and 2017 NEC 450.41: Vaults containing oil-insulated transformers shall be located where the vaults can be ventilated to the outside air without using flues or ducts, except where a petition for variance is approved.Wis. Admin. Code Department of Safety and Professional Services SPS 316.450
Amended by, CR 08-047: cr. Register February 2009 No. 638, eff. 3-1-09; CR 13-042: am. (title), (1) Register November 2013 No. 695, eff. 12-1-13; CR 16-093: am. Register June 2018 No. 750, eff. 8/1/2018.