CO129-426 - Public Offices - 1915 — Page 68

IT

will not be necessary to provide pole boxes for 50 C4

pairs as suggested in statement B, as a few circuita

only are distributed from each point. For these

points we recommend pole boxes, with lightning

protectors for 10 pairs, but even smaller boxes

might be considered suitable. The 10 pairs cable

under item 25 is intended for connecting these boxes

with the main cable. There these wires are jointed

to the main cables they should be tee'd on - without

breaking the wires in the main cable so that all

spare wires in the main cable will be available

for connection at any pole box on the section. This

method of connecting up the branch cables might be

adopted generally on the system.

-

(h) The pole distributing box in our list has

a separate compartment in which the dry core cable

is terminated. The open wires side of the box is

fitted with vacuum tube lightning protectors, and

3-ampare fuses. This type of protector is better

than the ordinary carbon protector, especially for

use in a damp climate, because of its higher ineu-

lation, due to all moisture being excluded from the

line and earth points. Boxes fitted with carbon

protectors and fuses would be cheaper and prices for

these are given under items 78 to 78 in case they

may be considered suitable for the climatic con-

ditions.

(1) Instead of the pothead splices and cast

iron

2.