(a)Test procedures. (1) Prepare one sample each of the
insulated surfaces of the battery box and of the cover that measure at least
4 inches by 8 inches, by the thickness of the sample which includes the
insulation plus the battery cover or box material. The insulation thickness
shall be representative of that used on the battery box and cover. If the
insulation material and thickness of material are identical for the battery
box and cover, only one sample need be prepared and tested.
(2) Prepare a 30 percent solution of sulfuric acid
(H(sub)2SO(sub)4) by mixing 853 ml of water with 199 ml of sulfuric acid (H(sub)2SO(sub)4)
with a specific gravity of 1.84. Completely cover the samples with the acid
solution at the test temperature range of 65 °F-80 °F (18.3 °C-26.7 °C) and
maintain these conditions for 7 days.
(3) After 7 days, record the condition of the samples.
(b)Acceptable performance. At the end of the test, the
insulation shall not exhibit any blistering, discoloration, cracking,
swelling, tackiness, rubberiness, or loss of bond.
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