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resistor

old bt phones, bring bring

i have a load of old bt phones which the ends are in old gpo chock boxes, can i convert these onto new bt connectors (431a plugs).. any info on these be grand thanks. merry christmas and happy new year. and my new years resoloution is not to kurse on open forums.. sorry phillip;)
- i=p/u
- Thread
- Dec 30, 2011
- aus electricians' talk old phone phones resistor these
- Replies: 6
- Forum: Australia
Resistor across a dimmer... help please

Hi Chaps, Hope someone can help me with the following. Have got a couple of wall lights on a standard rocker switch at present, with 2 x low energy lamps. These come to less than 40watts in total. Customer want to put a dimmer in that is rated from from 40w - 300w. Sure I've heard before...
- sythai
- Thread
- Nov 17, 2011
- across aus dimmer dimming electricians' talk energy help help please lamps please resistor while
- Replies: 10
- Forum: Australia
R
Fire alarm - what is this device it should be Resistor as its EOL on a call point -

Testing a fire alarm panel today as we have to extend it to add some more smoke heads and call points.So prior to work had a look around and made sure zones were identified correctly and readings on circuits were as they should be.On one zone circuit I had a capacitor in the panel across the...
- Roger
- Thread
- Oct 18, 2011
- alarm device electricians' talk fire fire alarm point resistor
- Replies: 10
- Forum: Security Alarms, Door Entry and CCTV (Public)
M
Resistor X

ELLO ALL.. kinda stuck.... if anyone care to help me out? Q is..... two resistors of X ohms and 4 ohms are connacted in series to 20 V d.c supply. if the p.d across the X ohms is 4V, determine.... 1,the p.d across the 4 ohm resistor.. 2,the current taken by the supply.. 3,the value of...
- MrPandaram
- Thread
- Oct 16, 2011
- aus electricians' talk resistor
- Replies: 23
- Forum: Australia
T
test board resistors

hi all, anyone have any idea what resistors colleges put in test boards to simulate longer cables for decent ring test results? cheers!
- tawraste
- Thread
- Jul 31, 2011
- aus board drawings electricians' talk google resistor resistors results test
- Replies: 4
- Forum: Australia
E
Need Help Working Out This Question!

The Following resistors are connected in series to a 240v supply, 10ohm, 20ohm, 30ohm, calculate to power dissipated in the 10ohm resistor. How do i do this, and how would i do it for the 20ohm and the 30ohm resistor? Cheers Ed.
- Edwardioo
- Thread
- Mar 23, 2011
- again circuit doesn't electrical work electricians' talk help need help out question resistor voltage working
- Replies: 10
- Forum: Electrician Courses : Electrical Quals
D
Dimmer buzzing

Hi all quick question I recently installed 8 downlights 50w lamps low voltage. The problem is i'm getting a slight buzz at the fusebox when the dimmer is dimmed (400w dimmer) the breaker is a 10a wylex breaker tnc-s any suggestions would be great.
- Delboy247
- Thread
- Dec 31, 2010
- bulbs buzzing dimmer electricians' talk resistor
- Replies: 17
- Forum: Talk Electrician Forum
S
Resistor value ?

I am trying to find the resistor value of Rx in this diagram, can someone please help.:confused:
- stueelad
- Thread
- Sep 13, 2010
- electricians' talk resistor value
- Replies: 16
- Forum: Electrician Courses : Electrical Quals
U
I need a dimmer capable of dimming 1500W for 3 x Chandeliers.

Hi Guys - I'm trying to find the best solution for this - It has been wired recently but the installed 1000w dimmer has blown. This is on a single metal back box. The dimmer controls 3 big chandeliers switched altogether. Total load of each chandelier is: 480w. Total load altogether is...
- Unswitched
- Thread
- Sep 10, 2010
- aus controller dimmer dimming electricians' talk remote resistor these
- Replies: 8
- Forum: Australia
B
Help!! What variable resistor do i need?

Hi, I need a little bit of help, i am going to wire a battery pack to a small electric motor, but i need to be able to control the speed of the motor. I know i need a variable resistor, but which one? I am really confused and need someone who has the knowledge to explain to me, what resistor i...
- benjihubbs
- Thread
- Aug 27, 2010
- aus electricians' talk help resistor variable
- Replies: 17
- Forum: Australia
B
end of line resistor

Hi all, I am installing a fire alarm, justrealised that for each zone and sounder circuit,there should be an end ofline resistor, cannnot find it in screwfix. what will happen if i dont use it? cheers in advance
- bluesky
- Thread
- Jul 14, 2010
- electricians' talk resistor
- Replies: 5
- Forum: Electrical Wiring, Theories and Regulations
P
resistor values

resistor value software for i pod Resistor Color Code
- Phil
- Thread
- May 9, 2010
- electricians' talk resistor values
- Replies: 18
- Forum: Electrician Courses : Electrical Quals
L
1-10v dimmers

has anyone got experence with installing these Apollo Lighting Ltd - DC/100 what cable should you use. I need to install four to supply four diffrent areas in a school class room, its a surface conduit job
- leekemp85
- Thread
- Feb 22, 2010
- aus dimmer dimmers dimming electricians' talk index lighting resistor
- Replies: 11
- Forum: Australia
3 way switching and low energy bulbs

There are low energy bulbs installed on a standard lighting circuit, there is 3 or 4 way switching using standard intermediate and 2 way switches, all tests ok with no deviation to regs. WHY do the low energy bulbs constantly pulse at about 40 pulses per minuite, it looks like they are trying...
- cbw
- Thread
- Dec 22, 2009
- 3 way aus bulbs capacitor electricians' talk energy rated resistor switch switched switching
- Replies: 3
- Forum: Australia
H
using voltmeter

What will happen if we use a voltmeter to measure current in a circuit. I mean if we connect our voltmeter leads at different points on current carraying wire/coil?
- hashimaba
- Thread
- Aug 10, 2009
- across connect current electricians' talk measure resistor using volts
- Replies: 3
- Forum: Periodic Inspection Reporting & Certification
T
How much power will a resistor rated at 1/2 w...?

How much power (in mW) will a 680W resistor rated at ½ W dissipate when it conducts a current of 15 mA? Could you tell me how can you get the answer?
- turbomen
- Thread
- May 10, 2009
- aus electricians' talk power rated resistor
- Replies: 6
- Forum: Australia
G
Fitting a brake resistor to a VSD

Hello, i currently have a small project where i am required to fit a brake resistor to a vsd. i dnt no an awful lot on this subject. can anyone give me an explanation? cheers G
- GNEL
- Thread
- Mar 2, 2009
- canada electricians' talk fitting resistor
- Replies: 3
- Forum: Electrician Talk | All Countries
B
intermidiate rotery switch

hi all looking for a replacement dimmer type rotery switch but not dimming just an intermidiate type as existing has no markings any help
- beaver74
- Thread
- Feb 11, 2009
- electricians' talk resistor switch
- Replies: 3
- Forum: Electrical Wiring, Theories and Regulations
G
Value of a resistor?

Two resistors, when connected in parallel have an equivalent resistance of 15 ohms. If one of the resistors is 60 ohms what is the value of the other? Question from 2330. Can't apply 1/Rt = 1/R1 + 1/R2 + 1/R3 Was suggested use product over sum method, but not been able to calculate it...
- gm_bowen
- Thread
- Apr 15, 2008
- electricians' talk resistor value
- Replies: 2
- Forum: Talk Electrician Forum

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