GAI-Tronics 495-001 Mine Dial / Page Phone Interface Cabinet - Manual (Page 20)

Pub. 42004-198D
Model 495-001 Mine Dial/Page Phone Interface Cabinet Page: 20 of 22
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General
Wiring shall be installed so as to assure that there is adequate insulation of telephone wiring from
commercial power wiring and grounded surfaces. Wiring is required under these rules either to be
sheathed in an insulating jacket, in addition to the insulation enclosing individual conductors, assured that
this physical and electrical protection is not damaged or abraded during placement of the wiring.
Any intentional removal of wiring insulation for connections or splices shall be accomplished by
removing the minimum amount of insulation necessary to make the connection or splice, and
insulation equivalent to that provided by the wire and its jacket, or its enclosure, shall be suitably
restored, either by placement of the splices or connections in an appropriate enclosure, or by using
adequately insulated connections or splicing means.
Building and Electrical Codes
Telephone wiring shall comply with all applicable building and electrical codes in the local jurisdiction.
If there are no such codes applicable to telephone wiring, comply with Article 800 of the National
Electrical Code (NEC), entitled Communications Systems, and other applicable sections of that
Code incorporated therein by reference.
Physical Protection
In addition to the general requirements that wiring insulation be adequate and not damage during
placement of the wiring, wiring shall be protected from adverse effects of weather and the environment in
which it is used. Where wiring is attached to building finish surfaces (surface wiring), it shall be suitably
supported by means that do not affect the integrity of the wiring insulation.
Acceptance Test
1. Lift the handset of the Mine Dial/Page Phone and depress the handset pressbar switch to create the
off-hook state on the line or loop under test.
2. Listen for noise. Confirm that there is neither audible hum nor excessive noise.
3. Listen for dial tone. Confirm that dial tone is present.
4. Break dial tone by dialing a digit. Confirm that dial tone is broken as a result of dialing.
5. With dial tone broken, listen for audible hum or excessive noise. Confirm that there is neither audible
hum nor excessive noise.