90.4 Enforcement.

Violations of this Code are subject to the prohibitions set forth in Section 15.02.060 and the penalties set forth in Chapter 1.20, of this Municipal Code.

For commercial projects an electrical contractor shall be responsible for obtaining permits for electrical work performed.

• B. Section 90.8 is hereby amended by adding the following:

(C) Connecting Conductors. Accessory uses or other building, or signs, separately located on the same lot or premises shall have connecting conductors run underground. (Agricultural area excepted.)

(D) Spare Circuits. Where spare circuit protective devices are provided or space for future circuit protective devices are provided on the bus in any flush or semi-flush mounted panel, then raceways of sufficient capacity to permit utilization of such space or spaces shall be provided to an approved accessible location.

• C. Section 110.5 is hereby amended to read as follows:

110.5 Conductors. Conductors used to carry current shall be of copper, aluminum, or copper-clad aluminum unless otherwise provided in this Code. Where the conductor material is not specified, the sizes given in this Code shall apply to copper conductors. Where other materials are used, the size shall be changed accordingly. Notwithstanding any provision to the contrary, no aluminum conductors smaller than #6 A.W.G. shall be used.

• D. Section 334.10 is hereby amended to read as follows:

334.10 Uses permitted. Type NM, Type NMC, and Type NMS cables shall be permitted to be used in the following:

• (1) One- and two-family dwellings.

  • (2) Multi-family dwellings permitted to be types III, IV, and V construction except as prohibited in Section 334.12.

  • (3) No type NM, NMC, or NMS, or non-metallic sheathed cable (Romex) shall be used in commercial applications regardless of mixed-use occupancy.

• F. Section 690.4(A) is hereby amended to read as follows:

  • (A) Photovoltaic Systems. Solar Photovoltaic Systems shall only be installed by registered California Contractors License Board entities with a valid A, B, C-10 or C-46 contractor license or the property owner. Valid copies of the contractor's City of Temecula Business License and California Contractors License Board license shall be submitted on the plans.

The current carrying conductors of all sources of energy* shall be designed to deenergize, and remain de-energized, from their respective source of energy generation when the utility-supplied service's main breaker is opened (set to the "off" position) on the electrical system being energized by the aforementioned sources of energy.

*For purposes of this section, "sources of energy" includes alternating current, solar, wind, battery and fuel cell.

The point where the current carrying conductors are to be de-energized and remain de-energized shall be immediately adjacent to the point of energy generation or immediately adjacent to a combiner box, if so equipped. This shall apply to all electrical system installations, regardless of location of conductors inside or outside of any structures.

Solar systems not be installed on roofs.

Foundation and/or footings size plans and substantiating design calculations shall be submitted showing supporting member sizes, dimensions, materials and the loads which will be imposed on the foundation or footings. Where the supporting framework of the modules or arrays is shown as part of the laboratory approved system, design calculations will not be required for the supporting framework of the modules or arrays provided they are included in the approved listing. (Ord. 2025-14, 11/18/2025)