New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1922-04-30
New RadiOCOde
Issued by Fire
Underwriters
Designed 10 Meet Situation
Caused by Tremendous
Increase Of Home RAJ
dio Receiving Apparatus
Arresters Are Compulsory
Specific Details on Aerial
Equipment for the Cuid-
ance Of The Radio Fan

tive regulations covering radio receiv-
ing Installations that disclose considers
able modification as compared with the
requirements previously issued by FIRE
underwriters.
The specifications that follow were
drawn up by special committee Of The
National Fire Protection Association,
which is the authority for the national
electrical code and whose findings are
standards Of engineering practice. Be
sides the underwriting organizations
represented upon this special commit
tee. engineers acting for Che American
Radio Relay League, American Tele-
phone and Telegraph Company. Radio
Corporation Of America and the indie
pendent Telephone Association also
partIci pated.
The new rules are being published
SO proposed amendments to be included
ln future editions Of the electrical code
1t IS stated that the requirements con-
tanned in the current edition Of the
code were based largely on tire hnzards
incident to the equipment Of wireless
telegraph transmitting stations where
ahtennae Of considerable height and
length were used and where the hazard
OF hlgh potential equi pment had to be
consldered
The recent Widespread installation Of
,"o"t receiving sets has
.;n'a - te0 revision OF tive regula-
dcra, 'nE SCI ha'lng an IN
bo4arJ VIZ oo"Slo"reo ceFold OF
pcbIlcauon says. the principal danger
IS from lightning brought in over the
ahtenna 10 the equipment or to some
part oil the building. Where there is
r ~" "a Iei 'oi "h'ehh" 'hls hazard is re
oIIo"'"R spec lncatlons arc for
;'coel'lhE stations only:
National Electrical Code
Specifications Cor Eereivin,- g.,
tons OnlyD:
Antenna
"a. Antcnnaa o,,.;5. -, 1.:,,;.
shal! moi crose o,,e,. M on 'o'oRs
Iiubt or no,,.,, t""c' electr &c
corr,;,o. o. ~ VI any ''Icdi'
d,ed volt. ar rs;I,a "'Vt. ,na" SIX nun
wires, on shall il be so located ,hst
failure Of either antenna or Of tba
above mentioned electric Epbt or no,y4,
wires can result in II contact between
the antenna and such electric lieht or
power wires.
"Antennae shall bc constructed and
installed in Il strong and durable man
ner and shall be so located as to pra-
vent accidental contact with light and
lower wires by sagging or swinging
spices and joints in the antcnna
span, unless made with approved
clamps or splicing devices, shall be
soldered.
"Antennae installed inside Of build
ings are not covered by the above specI-
cations
Lead-ln Wires
81 Lead-in wires shall no of con-
per, approved copper-clgd ,teeI or otSnr
approved metal which VIII not corrodr
excessively. and in no case shall thay
De SnAi Ter than No. IA b. a s. gage
ny Ia.s w. go co eoplSHi cad stee',
he nd '''"'' w. II D. . gage may
"ItoJ :;
h,,iiJ% -" on inc outside OF
fou- = NV '"''e "eaf e' Nhan
nrI,., ~ e'ect''e Hgh' and
wan, h,, .;,,' Sop' 'eo mere"
az" 4.iinIy HNeo
n,ars,, sar tna' VII 7i MAINTAIN per
shall be in sddjtin,, ne 1'o"vo'uu'!or
on the wire ""''''' ~ d" ''"S u'"''oh
"I.aad-in ,.;ros s>or . ,...,,..
~ -a,-~, "'leS S"|' ehter o"'idlnR
sorptivs Insulating hushing.
Protective Device
&c. Each lead-in w;rs .ball 10 u.o
y;dod v-itb .' an ~ VIZ snatl De pro
,;cc n,ona' "' "pp ,I Ontu P'oJec'iNe dc
I;nsida ~ 'ida "Ho located
ncar ss nroc,;n .s+ - o" a. 'ua'"lhe as