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#111173 - 09/11/06 08:53 PM Telephone Installation  
Admin  Offline

Joined: Oct 2000
Posts: 3,460
When telephone companies were deregulated anyone could buy a pay phone and install it. The phone company would supply a line but the owner had to provide 120 volt to make it operate. The hose & clamps made an interesting no-thread coupling.

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#111174 - 09/11/06 09:41 PM Re: Telephone Installation  
ShockMe77  Offline
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Is the coupling there so it doesn't leak?

#111175 - 09/12/06 01:02 AM Re: Telephone Installation  
napervillesoundtech  Offline
Joined: Feb 2006
Posts: 144
Naperville, IL, USA
probably, you wouldn't want to waste any electrons due to leaky pipes [Linked Image]

#111176 - 09/12/06 05:29 AM Re: Telephone Installation  
pauluk  Offline
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Looks like the zig-zaggy run is also part of the scheme -- It makes the electrons slow down to go through that coupling!

#111177 - 09/12/06 10:04 AM Re: Telephone Installation  
sabrown  Offline
Joined: Dec 2002
Posts: 302
Ogden, Utah, USA
It looks like the original installation was shy on support for the EMT with only one clamp (now uunused) on the booth itself but nothing within 3' of the other end. EMT was (according to what we see now) a poor choice. Rather than replace the damaged conduit or even bend it back into a semblance of its original shape, and, because the original fitting would no longer span the joint, the hose and clamping solution is a poor substitute.

As I look at the damage to the conduit, I would say that this conduit was hit by a car bumper. So would IMC even held up? IMC encased in 2" of concrete across the sidewalk or even properly saw cut into and buried under the sidewalk still would not of held up to a car bumper.

EMT and fittings would not have held up for typical damage due to raised elevation above grade and someone just stepping on it.

I also find the strapping of the box for support interesting.

#111178 - 09/12/06 02:12 PM Re: Telephone Installation  
Trumpy  Offline

Joined: Jul 2002
Posts: 8,223
SI,New Zealand
Is there a disconnect on that box?.
Reason I ask that is because, I'd hate to be making a call and have some impatient guy, switch the phone off on me.

#111179 - 09/12/06 08:36 PM Re: Telephone Installation  
blackrd  Offline
Joined: Mar 2005
Posts: 27
shorewood,il, USA
The 120v is for the booth lighting.
The telco provides a diffrent dial tone for payphones. Most never notice the difference.

#111180 - 09/13/06 05:16 AM Re: Telephone Installation  
RODALCO  Offline
Joined: Dec 2005
Posts: 854
Titirangi, Akld, New Zealand
Makes you wander if there is an earth wire in that conduit.
It wouldn't be great to rely on that rubber bonded link for an earth if the conduit was the earth conductor.

The product of rotation, excitation and flux produces electricty.

#111181 - 09/14/06 03:13 AM Re: Telephone Installation  
Luketrician  Offline
Joined: Jul 2006
Posts: 272
Sale Creek, TN USA

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