i have checked the outlets and lighting wiring they seem to be ok.and have changed the circuit breaker.what else can i do before i call a eletrician and becomes very expensive?
there is at present no established approach in existence that ought to negate a magnetic container. the basically genuine way would likely be to cover the metallic rigidity in some style of insulative coating like plastic or glass.
what magnetic fields no harm sounds
You can't stop a magnetic field.magnetic fields are always generated so long as atoms are in motion.
USA It sounds like a loose neutral or hot connection. Turn the breaker off for each circuit that has problems. Check every box in that circuit. Remove the switch or receptacle, and check the connections. Make sure the wire is completely under the head of the screw and the screw is tight. If the wires are spliced at any box, take the wirenuts off and make sure there are no loose wires, and the stripped length of the wires is all the same length and the wirenut tightens up. Make sure the conductor is fully under the screw at the breaker. If problem persists, check the wiring at the neutral bar, making sure all wires are properly terminated, and only ONE white wire under a screw (some folks put more than one wire under a screw, causing problems). If problem still persists, when the power is acting up, check the incoming terminals of the main breaker, then the bus bars. You might have a bad main. But, if the problem is intermittent, it is probably a loose connection.
Check for ground in the breaker box (you'll have to take the cover off. be careful and throw the main breaker first). There is a neutral bar (sometimes two) on the side(s) of the box. in the US the white neutral wires and the bare copper ground wires are attached there. The only time the black and white wires go to the breaker and the copper goes to the neutral bar is for 220 volts. Coming in from either top or bottom of the box there will be a large wire connected to the neutral bar. That should be securely attached for optimum ground. If there isn't a large multi strand wire attached to the neutral bar, there will be a thick single strand copper wire attached to the neutral bar and then attached to a grounding rod in the ground, usually at the base of the pole. With the main breaker off, you can check to make sure all the white and bare copper wires on the neutral bar are tight. It also wouldn't hurt to check the connection to the breakers themselves. Good luck!
