Outdoor power supply structure requirements

How much clearance do overhead conductors need?

• 24½ ft over track rails of railroads [225.18 (5)]. For overhead conductors above pools, outdoor spas, outdoor hot tubs, diving structures, observation stands, towers, or platforms, follow the clearance requirements in 680.8. Overhead conductors must maintain a vertical clearance of 8 ft above the surface of a roof.

Are outdoor conductors a service conductor?

Outdoor conductors running to buildings aren’t necessarily service conductors. They may be feeders or branch circuit conductors originating in another building. They may provide power for area lighting, outdoor equipment, or a separate structure.

What size conductor should I use for a 50 ft span?

You can use conductors 10 AWG or larger for overhead spans up to 50 ft. For spans more than 50 ft, use 8 AWG or larger (unless supported by a messenger wire) [225.6 (A) (1)], as shown in Fig. 2. Fig. 2. For spans over 50 ft, use 8 AWG or larger (unless supported by a messenger wire).

What size conductor do I Need?

For spans over 50 ft, use 8 AWG or larger (unless supported by a messenger wire). Unless supported by messenger wire, overhead conductors for festoon lighting must be at least 12 AWG. Spans longer than 40 ft must be supported by a messenger wire with strain insulators [225.6 (B)]. Do conductors pass over a roof?

How do I know if an outdoor conductor is a service conductor?

To determine if outdoor conductors are service conductors, identify where the electric utility service point is, and review the Art. 100 definitions for feeders, branch circuits, and service conductors. If they’re service conductors, use Art. 230. Otherwise, use Art. 225, which covers outside feeders and branch circuits (Fig. 1). Fig. 1.

What size wire do I need for a festoon light?

Fig. 2. For spans over 50 ft, use 8 AWG or larger (unless supported by a messenger wire). Unless supported by messenger wire, overhead conductors for festoon lighting must be at least 12 AWG. Spans longer than 40 ft must be supported by a messenger wire with strain insulators [225.6 (B)].