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Bad components what component in a building emergency or egress light causes it to turn on when the power goes out and how does it work?

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Depending on brand/age it may be a normally closed relay which would be open when the 110 line voltage is present and closed when the voltage drops out. connected in line between the battery and the bulb in the unit, when the power goes out the relay closes completing the circuit between the battery and the bulb and causing it to illiminate it.

Some newer more sophisticated models have electronic systems that provide essentially the same functionality

Posted on Jan 04, 2009

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Posted on Jan 02, 2017

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Instaling a new pilot light assembly inBryant 234B boiler. The wires to the emergency shut off are not color coded in wiring diagram. Does it matter which wire (only 2 wires)goes where?


Hi Anonymous.
An emergency shut-off loop will almost always be set up so that the circuit is closed during normal operation, with a press of the emergency off button breaking, or opening the circuit. It's set up that way so that if a wire in the emergency circuit breaks, or gets disconnected, the system will shut down, rather than allow operation where the emergency off won't work.

Functionally speaking, if you only have two wires to the switch/button, then which way you connect them won't matter, since the switch will complete the circuit regardless of which way you flow the current. From a Code and consistency standpoint, one of the wires will be ground, and one of them will be hot. Most switches have leads indicating ground and hot on them, and you should be consistent with that. If nothing else, if someone else is later servicing or replacing the switch, also not knowing which wire is which, then they have less risk of mistaking a hot wire for a ground and getting zapped.

Depending on the setup, and whether it's AC or DC on the loop, you should be able to use either a voltmeter or an electricians hot-wire-detector to tell which lead is the hot lead.

Hope this helps, and good luck!
D

Nov 19, 2015 | Electrical Supplies

1 Answer

The lights work when switched on manually, but the clock component does not appear to be working. Is it possible that the clock part does not work when the lights will come on when switched on manually?


If this is a new installation the timer is mis-wired. Swap the wires on terminals 1 and 2. The timer clock motor is connected internally to terminal #1, which means that the incoming hot (Line) from the breaker needs to be on terminal #1. The lights (Load) are connected to terminal #2.

If this is a timer that has been in use for a long period of time, then the clock motor is bad. Make sure that you get the 120 volt clock motor. Replacement # is WG1570 http://www.aplussupply.com/intermatic/timer.htm

Nov 29, 2010 | Intermatic T101 - 24 Hr. Dial Time Switch...

2 Answers

I have a 1595-SWTTRWCC4 switch. None of the wiring diagrams show the two black wires coming from the switch. I am using the switch to turn on a light above the sink and use the outlet for counter top...


If the wires are coming out of the switch portion & not the outlet, 1 goes to power the other goes to that color wire that goes to your light. All you are doing with a switch is cutting one side of your power, putting switch in completes the circuit when it is turned on. Or breaks the circuit when it is turned off. The other wires, power in & back to light get wire nutted together.

Sep 04, 2010 | Pass & Seymour #TM818WCC6 15A White...

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No output from charger model SF-1252MA


the transformers of these chargers have whats called a thermal fuse....usually this fuse is wired inside the transformer itself....it is designed so that in case of excessive overloads or high temperature, the fuse will blow...this is to protect your home wiring from overheating and possibly catching fire.......it is a safety feature....by touching the cables together even for a moment caused an extreme overload condition which probably took the fuse out....you can still fix it but you need to open a few layers of the transformers wrapping to get access to the fuse.....some systems have other components called NTC's or PTC's....these are also temperature safety components.....chances of the regulating components going bad ae slim because their capacities are designed for high power, high temp conditions so chances are that only the fuse is gone....good luck

Apr 09, 2010 | Schumacher & Fast Charge Starter Charger

1 Answer

Triple rocker switch to control 3 function bathroom fan/light


I suggest you cut 3 pigtails out of your black wire (about 5-6" each and strip them so you can put a nut to tie them all together on the main wire, then do the same for your grounds using green 5-6" strips of wire and then connect all 3 switches with the pigtails to their proper locations. This WILL fix your problem.

Mar 08, 2010 | Leviton 1755 Triple Rocker Switch Decora

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Should a twoway room fixture actually be a three way ?!?!


The leviton 5603 switch described in the header is a three way wall switch.
I think what you are asking about is what electricians refer to as a "three way switch"
This is basically one outlet or device connected to two wall switches. 1) switch, 2) outlet or light fixture, and 3) another wall switch, three components, thus a three way switch. Installing or converting a fixture or outlet from standard to three way is something i would recommend contracting out to a licensed electrician. Unless you are really comfortable with electrical work.
It is a possibility that your wall outlets are already set up to be a three way switch. A lot of houses have this feature especially at the top and bottom of a stairway, depending on when your house was built. If it is not already configured it could mean stringing new wire behind the drywall which most often means tearing some of the drywall out so that it can be stapled to the studs and meet required building codes.
If, before the changes were made, you were able to turn on the light from either of the wall switches then you will only need to connect the wiring correctly at each of the components.
If you google 3-way switch you will find a ton of great info and wiring diagrams that will help you see exactly what goes into making them work, since they can be wired more than one way. It could help you decide whether or not it is a job you want to tackle on your own or if you want to hire a contractor.
Let me know if I didn't explain something clearly.




Mar 01, 2010 | Leviton 5603-wh 3 Way Decora Switch

1 Answer

HOT LEAD FROM SOLAR PANEL HAS A ELECTRICAL COMPONENT WHICH IS BROKE. WHAT IS IT? (6-V)


Either a voltage limiter (because a solar panel can put out upto 21 volts.... BUT more likely a diode - which prevents the storage batteries from discharging through the solar panels (power goes only INTO the batteries when the diode is working.
Radio Shack will be able to match it if you remove it and take it to them.

Jan 21, 2010 | Parmak Solar Fence Charger

1 Answer

No power


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Feb 09, 2009 | Schumacher & Fast Charge Starter Charger

2 Answers

Samsong syncmaster 920 nw


replace the power supply to the pc if the fan is not working it could be overheating and causing it to shut down.

Nov 13, 2008 | Electrical Supplies

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