bonded together using solid copper conductors, insulated covered, or bare, not smaller than 8 AWG or with rigid metal conduit of brass or other identified corrosion-resistant metal. Connections to bonded parts shall be made in accordance with 250.8. An 8 AWG or larger solid copper bonding conductor provided to reduce voltage gradients in the pool area shall not be required to be extended or attached to remote panelboards, service equipment, or electrodes.

(1) Conductive Pool Shells. Bonding to conductive pool shells shall be provided as specified in 680.26(B)(1)(a) or (B)(1)(b). Poured concrete, pneumatically applied or sprayed concrete, and concrete block with painted or plastered coatings shall all be considered conductive materials due to water permeability and porosity. Vinyl

liners and fiberglass composite shells shall be considered to be non-conductive materials.

(a) Structural Reinforcing Steel. Unencapsulated structural reinforcing steel shall be bonded together by steel tie wires or the equivalent. Where structural reinforcing steel is encapsulated in a nonconductive compound, a copper conductor grid shall be installed in accordance with 680.26(B)(1)(b).

(b) Copper Conductor Grid. A copper conductor grid shall be provided and shall comply with (b)(1) through (b)(4).

(1) Be constructed of minimum 8 AWG bare solid copper conductors bonded to each other at all points of crossing

(2) Conform to the contour of the pool and the pool deck

(3) Be arranged in a 300-mm (12-in.) by 300-mm (12-

in.) network of conductors in a uniformly spaced
perpendicular grid pattern with a tolerance of 100
mm (4 in.)

(4) Be secured within or under the pool no more than

150 mm (6 in.) from the outer contour of the pool
shell

(2) Perimeter Surfaces. The perimeter surface shall ex- tend for 1 m (3 ft) horizontally beyond the inside walls of the pool and shall include unpaved surfaces as well as poured concrete and other types of paving. Bonding to perimeter surfaces shall be provided as specified in

680.26(B)(2)(a) or (2)(b) and shall be attached to the
pool reinforcing steel or copper conductor grid at a
minimum of four (4) points uniformly spaced around
the perimeter of the pool. For nonconductive pool
shells, bonding at four points shall not be required.

(a) Structural Reinforcing Steel. Structural reinforcing steel shall be bonded in accordance with

680.26(B)(1)(a).

(b) Alternate Means. Where structural reinforcing

steel is not available or is encapsulated in a
nonconductive compound, a copper conductors) shall
be utilized where the following requirements are met:

(1) At least one minimum 8 AWG bare solid copper conductor shall be provided.

(2) The conductors shall follow the contour of the perimeter surface.

(3) Only listed splices shall be permitted.

(4) The required conductor shall be 450 to 600 mm (18

to 24 in.) from the inside walls of the pool.

(5) The required conductor shall be secured within or

under the perimeter surface 100 mm to 150 mm (4
in. to 6 in.) below the subgrade.

(3) Metallic Components. All metallic parts of the pool structure, including reinforcing metal not addressed in

680.26(B)(1)(a), shall be bonded. Where reinforcing steel is encapsulated with a nonconductive