Browse Forums Lighting + Lighting Design Re: Junction Boxes for future outdoor lighting 6Mar 05, 2009 12:14 pm we had junction boxes in the centre of the rooms for fans but they also require a provision for fan wall plates and a beam to which fan can be fixed. Our builder goofed up a bit.
Outdoors we had jn boxes for outdoor light and one for a sensor but apparently the sensor cant be put in as the jn box lacks additional cable for sensor. so, in conclusion- make sure you know exactly what you will be getting and whether it caters for your requirement. good luck Re: Junction Boxes for future outdoor lighting 7Mar 05, 2009 12:33 pm wonderland *Does one junction box go with one outdoor light, or can you connect a few lights to one junction box? *How would I go about connecting all the lights to the junction box? Especially coz the box in on the wall of the house, while the lights are all the way out in the garden? *Should I ask for a low positioned junction box so it's not sitting up so high? *If I wanted different lights to have different switches, do i need to get the builder to add more switches? Can they do that? wonderland, I will try to provide my understanding on this. (I am not an electrician ) A junction box is just a plastic box where your electricity cable is wired to. If you are to install garden lights in the future, your electrician can pull the wire out from the nearest junction box to connect to the lights. Your electrician will run the wire thru some pipes hidden underground to reach out to your garden where you lights locate. Should it be positioned high or low on the wall? It depends on where your lights will be - remember, shortest distance to your future lights locations. Each junction box is connected to a switch. If you want, say 3 switches for 3 different lights, you need 3 junction boxes. Now, the last question is, can a junction box connects to more than one light? (This is where I think I stuff up for my plan. ) I thought one junction box can serve many lights, so I didn't think too much and only allowed for one junction box for my backyard and one for front garden. I think this is a mistake. It depends on how many lights you will have. One junction box is like one light point, you can draw too much current out of it. It may support couple of lights, but won't be enough if you have lots of lights. Any electricians out there, can you please enlighten us on this??!!! Can my problem be fixed?? Building Clarendon Brighton - Done and moved in Sept 2009 Re: Junction Boxes for future outdoor lighting 8Mar 05, 2009 1:00 pm We don't have a junction box where we are going to have garden lights, my friend the electrician who will be doing the job for us told me you don't need one, just connect it to a light switch. l dont know if that helps anyone, but l thought that was handy to know Re: Junction Boxes for future outdoor lighting 10Mar 05, 2009 1:22 pm hey chuth77, is there any way I can install more lights out of that wire from that one junction box? Or just have to pull more wires out from the circuit?? Building Clarendon Brighton - Done and moved in Sept 2009 Re: Junction Boxes for future outdoor lighting 11Mar 05, 2009 1:27 pm Thanks everyone for their opinions!
So if we can put a few lights on one junction box, how many is a few lights? Or is it still one garden light per junction box. Garden lights are usually 12v, so i would have thought that you would be able to put a few lights on one junction box? Re: Junction Boxes for future outdoor lighting 12Mar 05, 2009 1:33 pm eho hey chuth77, is there any way I can install more lights out of that wire from that one junction box? Or just have to pull more wires out from the circuit?? Hello Eho this is rather simple ..... The junction box will have a current rating .. example 10 amps...... Assume you have a 240 volt supply. The bulb resistance will cause a particular current to flow (I=V/R) and this will result in a certain amount of power being dissipated (P=VI=V^2/R). This means that a 40watt bulb has a specific resistance resistance (R_{40W}=V^2/P=240^2/40=720\Omega) (I_{40W}=V/720=0.165 Amps). so you can run say 5-7 of these 40 W globes, if you install larger ones then fewer... if you use super efficient energy ones of 8W you can install many of these !! hope that helps Buildling a Clarendon Crestmead in Sydney DA Approved on 20/03/2008 Slab Poured on 02/09/2008 Frame Completed 15/10/2008 Brickwork Complete 2/02/2009 Roofwork Complete 05/03/2009 Re: Junction Boxes for future outdoor lighting 13Mar 05, 2009 1:35 pm Conduit J Box
Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Handy if you need to extend via conduit on outside areas to more than one point, will have no connectors in them Standard J Box Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Normally Internal or areas where no water can enter, will have connectors in them Electrical Wholesaler Re: Junction Boxes for future outdoor lighting 14Mar 05, 2009 2:02 pm I have that first junction box pictured in blahs message. Its located in the outside alfresco area and there's a light switch for it inside the house.
I thought it was to be used for one light not several as there is only one light switch. .Be good if it was ..then i could have additional outside lighting. Some of my neighbours have two on the front of their house for future out door lighting. Re: Junction Boxes for future outdoor lighting 15Mar 05, 2009 2:03 pm I have that first junction box pictured in blahs message. Its located in the outside alfresco area and there's a light switch for it inside the house.
I thought it was to be used for one light not several as there is only one light switch. .Be good if it was ..then i could have additional outside lighting. Some of my neighbours have two on the front of their house for future out door lighting. Re: Junction Boxes for future outdoor lighting 16Mar 05, 2009 7:05 pm lobo eho hey chuth77, is there any way I can install more lights out of that wire from that one junction box? Or just have to pull more wires out from the circuit?? Hello Eho this is rather simple ..... 0.165 Amps... so you can run say 5-7 of these 40 W globes Obviosuly not that simple.... Try 60 of them... That's providing you have nothing else on the circuit and you have a 10A circuit breaker, which you won't... You'll have a 16A or 20A.... meaning you can add even more! When you say external lights, are you meaning on the house, or in the garden... Eho, yes you can add additional lights out of that one jbox. Just have a think about where the cable will run though because sometimes it will be very difficult to install new cable after construction is finished... It can often be more cost effective to get the sparky to install a jbox in critical locations... Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Junction Boxes for future outdoor lighting 17Mar 05, 2009 8:25 pm Are you serious chuth?!
Can we run that many garden lights from one junction box. Oh and yes i mean garden lighting and not lights attached to the house. Thanks. Re: Junction Boxes for future outdoor lighting 18Mar 05, 2009 9:13 pm If that is the only "lighting" on that circuit then yes... It all depends on how your electrician wires it initally...
If it is garden lighting then just make sure the junction box is put in a suitable location for ease of extending the circuit... In all reality you may only have a couple of amps spare, which means you would be able to run at least 10 40W lamps.... and as mentioned previously if you use a lower wattage bulb, then that number increases... Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Junction Boxes for future outdoor lighting 19Mar 05, 2009 9:24 pm Thanks for that. Also, just wondering, what is the different between wolts and voltage?
Sorry for the 'dumb' question, I just dont get electricity! Re: Junction Boxes for future outdoor lighting 20Mar 05, 2009 9:31 pm Watts is the power output of a device....
Volts & Current make the device work.... Volts is the difference between two parts of a circuit, while current is the amount flowing through that circuit... Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Scientists have used random matrix theory to demonstrate theoretically that the neutrino mass hierarchy can be explained mathematically. When a substance is fragmented… 21 20651 Building Standards; Getting It Right! 1. optional, you can but normally just use the earth from the main switch board 2. should be enough but the distance determines voltage drop - sparky should work it… 1 28812 I have a really long hallway which is 1100mm W x 11500mm L I would appreciate if anyone can give suggestions to light it up with Linear LED lights that goes from wall to… 0 8814 |