Section 30. Purpose, Scope, and Application of Rules

PSC 114.302 PSC 114.302 Application of rules. [NESC 302, p. 247] (Change) Change Rule 302 to read:

302. Application of Rules

The general requirements for application of these rules are contained in s. PSC 114.005.

PSC 114.302 History History: CR 07-021: cr. Register January 2008 No. 625, eff. 2-1-08; CR 13-039: r. and recr. Register June 2014 No. 702, eff. 7-1-14; CR 18-007: am. (intro.) Register February 2020 No. 770, eff. 3-1-20.

Section 31. General Requirements Applying to Underground Lines

PSC 114.310 PSC 114.310 Referenced sections. [NESC 310, p. 248] (Change) Change Rule 310 to read:

310. Referenced Sections

The Introduction (Section 1) as amended by s. PSC 114.010, Definitions (Section 2) as amended by Section 2 of Chapter PSC 114, List of Referenced Documents (Section 3), and Grounding Methods (Section 9) as amended by Section 9 of Chapter PSC 114, shall apply to the requirements of Part 3.

PSC 114.310 History History: CR 07-021: cr. Register January 2008 No. 625, eff. 2-1-08; CR 13-039: r. and recr. Register June 2014 No. 702, eff. 7-1-14; CR 18-007: am. (intro.) Register February 2020 No. 770, eff. 3-1-20.

PSC 114.317 PSC 114.317 Outdoor location of oil-insulated padmounted transformers near buildings. [Follows NESC 316, p. 250] (Addition) Following NESC 316, add the following section:

317. Outdoor location of oil-insulated padmounted transformers near buildings.

A. Noncombustible and Combustible Walls

For the purposes of this section, combustible walls are walls of Type No.V buildings as determined by Wisconsin Building Code (Construction Classification IBC Chapter 6). All other walls are considered to be non-combustible.

B. Noncombustible Walls

Padmounted oil-insulated transformers may be located directly next to noncombustible walls if the following clearances are maintained from doors, windows and other building openings.

1. Padmounted oil-insulated transformers shall not be located within a zone extending 6.1 m (20 ft) outward and 3.0 m (10 ft) to either side of a building door. See Figure PSC 114-317B1.

1

Figure PSC 114-317B1.

2. Padmounted oil-insulated transformers shall not be located within a zone extending 3.0 m (10 ft) outward and 3.0 m (10 ft) to either side of an air intake opening. Such transformers may be located within said zone beneath an air intake opening provided there is not less than 7.6 m (25 ft) diagonal separation between the transformer and said opening. See Figure PSC 114-317B2.

2

Figure PSC 114-317B2.

3.a. Padmounted oil-insulated transformers shall not be located within a zone extending 3.0 m (10 ft) outward and 0.9 m (3 ft) to either side of a building window or opening other than an air intake. See Figure PSC 114-317B3a.

PSC 114.317 Note Exception: This does not apply to a glass block or fire window meeting the requirements of the Wisconsin Commercial Building Code (Fire Window IBC Chapter 7, Section 714.3).

3

Figure PSC 114-317B3a.

3.b. For second story windows, the transformer shall not be located less than 1.5 m (5 ft) from any part of the window. See Figure PSC 317B3b.

PSC 114.317 Note Exception: This does not apply to a glass block or fire window meeting the requirements of the Wisconsin Commercial Building Code (Fire Window, IBC Chapter 7, Section 714.3).