Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




1554 posts

Uber Geek


#191929 21-Feb-2016 12:29
Send private message

I picked up an old Leitz Prado 500 projector yesterday, but unfortunately someone cut most of the cord off of the plug, opening the plug up, there are two very short pieces of wire remaining - one white and  one black. I want to put another cord on to the plug so I can see if the projector works, but which of the wires is positive? Does anyone know?


Create new topic
2256 posts

Uber Geek


  #1496533 21-Feb-2016 13:19
Send private message

What sort of plug?

Does it fit in either way round?
If it does it doesn't matter.




Electrician.

 

Location: Dunedin

 

 


10559 posts

Uber Geek


  #1496534 21-Feb-2016 13:34
Send private message

It's probably over 1/2 century old.  Even if it doesn't matter which is phase and neutral, I'd be careful - pull the thing apart and have a close look at the state of the wiring inside, as from your description it doesn't have an earth.

 

If there's a power switch and/or fuse in the device, that would normally be connected from the phase pin on the plug.  If the bulb is typically for that age one with a centre pin, then that centre pin would normally be phase.  Even if it all looks good, I think I'd first fire it up "gingerly" only on an RCD protected circuit, after at minimum testing for any leakage from either pin to the metal case of the thing, and also look for clues in case it was a 110/120V appliance - not 230V, just in case the fan motor might emit smoke, and the lamp emit one bright short-duration flash.  If there's no external marking to tell you, then the bulb and fan motor may have voltage rating marked on them.  Make sure the fan motor turns freely.

 

I'd have in the back of my mind the thought as to why somebody might have cut off the cord -  that may have well been that they wanted to render it inoperative, as they'd had one of those very uncomfortable and potentially dangerous experiences that unsafe old 230v appliances can give.


 
 
 
 




1554 posts

Uber Geek


  #1496547 21-Feb-2016 13:51
Send private message

andrewNZ: What sort of plug?

Does it fit in either way round?
If it does it doesn't matter.

 

 

 

It's this plug, the wire is actually grey, not white, but yes, it plugs in either way round

 

Hopefully the link works

 

http://1drv.ms/1SYVgZ7


23457 posts

Uber Geek

Trusted
Subscriber

  #1496550 21-Feb-2016 14:03
Send private message

Fred99:

 

I'd have in the back of my mind the thought as to why somebody might have cut off the cord -  that may have well been that they wanted to render it inoperative, as they'd had one of those very uncomfortable and potentially dangerous experiences that unsafe old 230v appliances can give.

 

 

Cutting the plug off is normal for appliance disposal where you are not going to test and tag it etc. Part of one of the standards for appliance testing.





Richard rich.ms

10559 posts

Uber Geek


  #1496567 21-Feb-2016 14:26
Send private message

richms:

 

Fred99:

 

I'd have in the back of my mind the thought as to why somebody might have cut off the cord -  that may have well been that they wanted to render it inoperative, as they'd had one of those very uncomfortable and potentially dangerous experiences that unsafe old 230v appliances can give.

 

 

Cutting the plug off is normal for appliance disposal where you are not going to test and tag it etc. Part of one of the standards for appliance testing.

 

 

 

 

Making assumptions is dangerous.  Unless known, then anybody could have cut off that cord for any reason.

 

That projector should be checked by a competent owner (as defined in ECP 50) or electrician before plugging it in.




1554 posts

Uber Geek


  #1496588 21-Feb-2016 16:02
Send private message

Fred99:

 

richms:

 

Fred99:

 

I'd have in the back of my mind the thought as to why somebody might have cut off the cord -  that may have well been that they wanted to render it inoperative, as they'd had one of those very uncomfortable and potentially dangerous experiences that unsafe old 230v appliances can give.

 

 

Cutting the plug off is normal for appliance disposal where you are not going to test and tag it etc. Part of one of the standards for appliance testing.

 

 

 

 

Making assumptions is dangerous.  Unless known, then anybody could have cut off that cord for any reason.

 

That projector should be checked by a competent owner (as defined in ECP 50) or electrician before plugging it in.

 

 

 

 

I'm competent, I have wired up new lights, shifted switches etc and had them signed off, plus I have also done an Appliance testing course. I just have never come across black and white(grey) wires on a plug before.. oh and yes, the wiring in the projector is fine and the bulb looks fine too, and it is rated for our voltage and 110v by way of a switch that can be flicked under the fan cover.


6014 posts

Uber Geek

Trusted
DR
Lifetime subscriber

  #1496600 21-Feb-2016 17:17
Send private message

semigeek:

 

I picked up an old Leitz Prado 500 projector yesterday ...

 

I have to ask - why do you want to use an antique projector?  undecided





Sideface


 
 
 
 




1554 posts

Uber Geek


  #1496603 21-Feb-2016 17:34
Send private message

Sideface:

 

semigeek:

 

I picked up an old Leitz Prado 500 projector yesterday ...

 

I have to ask - why do you want to use an antique projector?  undecided

 

 

 

 

Because it would have been cool to use, I like the old equipment. I still use an old 8mm Film Projector.

 

Anyway, wired up the slide projector, but it doesn't go, so will flick it off.

 

 

 

 


Create new topic




News »

Freeview On Demand app launches on Sony Android TVs
Posted 6-Aug-2020 13:35


UFB hits more than one million connections
Posted 6-Aug-2020 09:42


D-Link A/NZ extends COVR Wi-Fi EasyMesh System series with new three-pack
Posted 4-Aug-2020 15:01


New Zealand software Rfider tracks coffee from Colombia all the way to New Zealand businesses
Posted 3-Aug-2020 10:35


Logitech G launches Pro X Wireless gaming headset
Posted 3-Aug-2020 10:21


Sony Alpha 7S III provides supreme imaging performance
Posted 3-Aug-2020 10:11


Sony introduces first CFexpress Type A memory card
Posted 3-Aug-2020 10:05


Marsello acquires Goody consolidating online and in-store marketing position
Posted 30-Jul-2020 16:26


Fonterra first major customer for Microsoft's New Zealand datacentre
Posted 30-Jul-2020 08:07


Everything we learnt at the IBM Cloud Forum 2020
Posted 29-Jul-2020 14:45


Dropbox launches native HelloSign workflow and data residency in Australia
Posted 29-Jul-2020 12:48


Spark launches 5G in Palmerston North
Posted 29-Jul-2020 09:50


Lenovo brings speed and smarter features to new 5G mobile gaming phone
Posted 28-Jul-2020 22:00


Withings raises $60 million to enable bridge between patients and healthcare
Posted 28-Jul-2020 21:51


QNAP integrates Catalyst Cloud Object Storage into Hybrid Backup solution
Posted 28-Jul-2020 21:40



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.