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Question:

Hey all, I have a question about electrical wiring in a house that was built in 1975?

I will be installing spray in foam in the wall cavities and am wondering if I should have all of the wiring replaced (electrical outlets and the such) before. I've read it's difficult to replace wiring once the foam has become rigid. My fear is that a wire will short and the electrical outlet will become useless (due to previously stated problem). Any information is greatly appreciated.

Answer:

What material is your wiring made of? Aluminum(silver and brittle) or copper. Are you sprayng in expanding foam or just foam insulation? How many breakers in panel? How big is your home? Answering these questions will give me idea if you need to redo electrical -------------------------------------- Not sure what the wiring is, whatever was used at that time House is 2400 sq ft I believe the easiest is the retro foam type, although not from that company 40 breakers, 34 currently in use Would replacing all outlets with GFI's be a cheaper way of protecting the wires? ------------------------ You need to find out if its aluminum or copper. alum was used in the 70's and I suggest removing it if it is. its brittle and can have problems in the future. the lumex will say if its copper or aluminum on it try and look near panel for this information Exterior only walls need the insulation so interior would be fine. All your outlets a 2 prong or 3 prong configuration in your house?
this is one of those scratch your head questions. on one hand if your electrical works fine now, in theory it should continue to work fine, but if you ever did have a problem it would be a nightmare to replace wiring in those spray foam walls but not impossible. i would say if you have gutted the walls to the bare studs and have the money to replace the wiring in those walls that are going to be insulated it wouldn't be a bad thing. far as that goes you could run a piece of pvc conduit for the outlets or switches stub just above the wall, then if you ever had a problem in the future it would be no problem to pull the wire out and replace it. if they are spraying the insulation in the wall with sheet rock in place then that's going to get kinda expensive replacing the wiring in the walls, will be very labor intensive fishing wires down the walls. i guess you have to decide to either roll the dice or not.
do you think before you speak. the house was built in 1975 it should have insulation in the walls already.how are you going to get that out. in 1975 they used romex wire and that will last longer than 100 years some thing smells here, are you a troll.
There is no benefit in insulating interior walls, only walls to the exterior need insulating and they should already be insulated. If you’re trying to get rid of drafts install the foam gaskets on all light switches and wall sockets. Clean caulk all windows check and replace exterior door weather strips add more insulation to the attic.
unsure what an electric powered pen is, I decide to apply a multi-meter style gadget, that tests for continuity, AC or DC voltage and delivers the quantity of each and every. you're saying that there is a present day, yet no point out of how a lot. looks such as you have a returned feed from someplace in the circuit. the percentages are that the corridor and bedrooms are all on the comparable circuit, which should not be, yet in older properties it befell greater usually than it would, exceptionally if the home proprietor does the wiring. it is likewise obtainable that there is one or 2 shops that have unfastened or broken wires going to them. i've got seen it ensue greater advantageous than as quickly as, and on an identical time because it 's no longer relaxing looking it, it extremely is done. maximum suitable advice could be to get a qualified electrician in for a glance-see. it may well be somewhat easily worth the money. by technique of how, Stanley, i've got worked on hundreds of properties, electric powered systems, taught electric powered in 4-H for years, and have under no circumstances heard of retailers being under pressure in sequence. that could make no experience in any respect. shops are under pressure in paralell.

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