CO129-464 - Public Offices - 1920 — Page 110

CO129 Colonial Office Hong Kong Records 理藩院香港檔案 All

HOM KOM REQUISITION NO

2381.

106

for

600 YARDS BURMANINS CANLE, GUTTA POROLA INSULAT TD,

CORE 44-1/2 lbs, CFP®/130 lbs, 0,F.,BRABS TAPED.

(1) Zach conductor shall consist of a single

strand composed of thres wires, each of the same

diameter, of high conductivity copper, having a

con motivity of not less than 100% of pure copper

according to Matthiessen's standard, The completed

conductor to weigh 44-1/2 lbs. par nautical mile of

2,029 yards, or within 2-1/2 per cent. thereof, but

the average weight shall not be less than that

onsdified.

of

The mean resistance per nautical mile

conductor at a temperature of 74° Fahrenheit

to be at more than 26 standard obes, The wira

shall be free from flaws, splits, or other defects;

it shall be truly sylindrical, and shall bear

wrapping round its own diameter in six turne,

unwrapping, wrapping on again, and unwrapping a second

time without breaking, after it has been insulated

sa hereinafter specified.

(2) The conductor to be insulated with two of

more coatings of gutta-percha of the best description

and manufacture, and of uniform radial thickness, E

Layer of Chatterton's compound being applied next to

the

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