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Subchapter 5. Electrical Safety Orders
Group 2. High-Voltage Electrical Safety Orders
Article 9. Open Wiring (Bare) (Formerly Article 58)

§2756. Spacing Between Bare Energized Parts and Adjacent Surfaces.

Minimum spacing for bare conductors shall be in accordance with Table 2756, although greater spacing may be required by unusual atmospheric or other special conditions.


 
                          Table 2756 
 Minimum Spacing in Inches Between Bare Energized Parts 
                     and Adjacent Surfaces 

Voltage           Outdoor                     Indoor 
Phase       Phase           Phase       Phase        Phase 
 to           to              to          to           to 
Phase       Ground          Phase       Ground        Phase
     601       3-1/2           5             3/4         3/4 
    750       3-1/2           5             3/4         3/4 
   1200       3-1/2           5           1 1/4       1 1/4 
   2500       3-1/2           5           2           2 1/2 
   5000       6               7           2 1/2       4 
   7500       6               7           4           5 
  15000       7              12           6           7 
  23000      10              15          10          15 
  35000      13              18          13          18 
Above 35 KV.37/KV .455      /KV36       /KV .455    /KV

NOTES:

(1) Spacings shown are minimum for energized parts to energized parts or energized parts to ground for elevations up to 3,300 feet above sea level. From 3,301 to 10,000 feet elevations, increase spacings by 10 percent, and above 10,000 feet elevation, increase spacings by 20 percent. For voltages above 230 KV, spacings shall be as required for the BIL of the system.

(2) For intermediate values of system voltage, use next higher voltage in table.

(Title 24, Part 3, Section 3-710-33.)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.

HISTORY

1. Editorial correction filed 11-2-83 (Register 83, No. 45).

2. Amendment filed 1210-87; operative 1-9-88 (Register 88, No. 1).

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