, 1922-06-08
OFFICIAL NOTICE


Rules for the installation and PrOtcc.
ton Of Radio Telephone and Tele-
graph Stations Within the Tor por-
ate Limits Of the City of RaNslins,
WyOning:
Radio apparatus installed and
maintained in accordance with the
following rules and regulations will.
in no way, affect the fire insurance
rates or the validity OF the fire in
surance policies: but where such ap-
paratus is not properly installed and
maintained. especially where an
aerial antenna is used or where the
radio apparatus takes current from
the electric light or power GREATS, 1t
presents a distinct fire las we'll a.
iifc) hazard and must be recognized
in the analyzing of the hazards for
determining fire insurance rates.
The installation OF the aerial an
tennas OF other conductors outside
of buildings and the extension OF
these conductors to radio apparatus
within the buildings for receiving or
for both sending and receiving, I'M
less properly arranged and safe
guarded. will tend to induce light
ming discharges to enter the premises
So : "lNFliIuo oit uI
over or near electric light and power
lines. there is danger OF a cross
with wires carrying a high potential
current which in itself would consti-
tute a serious life and fire hazard.
All radio installations for send
ing Il all .raceiving'' stations
having outside aerial %antennaS. or
with apparatus having any connection
with light and power circuits must
he inspected and approved by the
City or Town Electric Wiring In
spector or by the Mountain States In
sp"ction bureau.
RADIO RECEIVING STATIONS
(N"t Tran>mitting)
/. Aerial %antennas must be con-
structcd and installed in a good sub
stantial and workmanlike manner
Must not be attached to or in any
way supported by poles carrying
electric light and power circuits.
The installation OF radio %antennas
or guy wires over or heal electric
light and power lines should be
avoided, but in case it is found nee
essary to place such wires over cleo
trio light or power circuits. having a
potential owe 300 volts. a special
permit in writing must be obtained
from the City or Town Electric Wir-
ing Inspector. and the general ON
struction must be sQual to the on
struction of the supply lines passed
over: must be permanently and Sc
cureiy supported at least 6 feet
above the electric light and power
lines on "Class A" poles or other
supports equally as good: poles or
towers to be substantially. guyed in
accordance with the best practices
employed in electric light and power
line construction. The size Of an
tenna wire twhere crossing light and
power linns) to be not less than spe-
Gifted in the following table:
HARD DRAWN COPPER OR STEEL
REIN FORCED ALUMINIUM
With span of ITS it. or less No 6
B. Il s. Gauge.
With span over ITS It. to 800 IT,.
No. 4 p. & S. Gauge.
With span over 800 IT,, No. 2 B. &
S. Gauge.
ALUMINUM-(Not R%einforced)
With span of $50 It. or less, No. l
B. & s. Gauge.
With span over $50 It. to 900 IT,.
No. 0 B. & S. Gauge.
(Span over 800 It. not permitted
9. The lead-in-wire' from the an
tenna to the apparatus within tho
building should be a size equal to the
conductors CT the antenna but must
moi be less than No. IA B. & 8. gauge
and should be Of copper or aluminium.
From the lightning arrester to the
apparatus within the building must
have an approved insulating covering
not less than three-Sixty-fOurthS of an
inch in thickness and covered by a
substantial braid. Must be securely
supported on glass or porcelain in
sulators or knobs. ana shall be in
sulated where entering building by
4 continuous tube or bushing OF
porcelain. glass or approved compost
ton. such as "Bakelite" or other
equally good insulating materials.
These tubes or bushings shall slope
upward from the outside.
3. All wiring inside the building
used in connection with radio re-
criving apparatus must be properly
insulated. supported and arranged In
a good substantial manner Must
not come nearer than two inches to
any electric light or power wire in
the building.
I. Aerial antennas for receiving
only must be protected from light
aing discharges and possible crosses
with high potential electric light and
power lines. by an approved ground
ed ShOrtgap or vacuum type lightning