(LIFE SAFETY WARNING! [disclaimer]
Electricity is dangerous!
You can be injured or killed!
Improper installations can cause fire, injury and death!
1] Combinations of aluminum and copper conductors require precise procedures and materials for proper termination at a splice.
2] All conductors are required by the NEC to terminate in a suitable enclosure whose volume has been determined on the basis of the size, type and number of conductors entering the enclosure, the entry fittings, installed devices, etc. <><><> Copper and aluminum exposed to the air will react and the resulting corrosion will form a very bad, high resistance, connection that will get hot and could start a house fire when high current flows through it. To avoid this risk you need to use special connectors which have been designed to connect aluminum wire to copper wire. <><><> You must use an approved Anti-Oxidant Compound such as "Noalox", or connectors "listed" for that purpose. <><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work
always use an electricians test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
You must use a special connector designed to connect copper and aluminium. When the two metals are connected, the aluminium will corrode because of electrolytic action. Because of that, there is a high risk of the connection overheating and causing a fire. By using special connectors designed to join copper and aluminium, the join will be OK. Otherwise, it will become very dangerous.
In general, any metal higher than copper in the "electromotive series" will displace copper from copper sulfate solution. This category includes all the alkali and alkaline earth metals and other common metals such as iron and zinc. For example Aluminum and Iron both displace Copper: Aluminum in Copper sulfate will trade places in the ionic balance of the solution and 'join' with the sulfate. CuSO4(aq) + Al(s) ==> AlSO4(aq) + Cu++(s) Because this single displacement reaction occurs in immediate proximity to the aluminum, Copper++ ions accumulate in a fluffy rust colored fur around the aluminum. Iron in Copper Sulfate will also go into the aqueous sulfate solution and the Copper will precipitate onto the Iron CuSO4(aq) + Fe(s) ==> FeSO4(aq) + Cu?(s) This reaction happens at the ferrous surface more intimately than the Aluminum and the Copper is deposited as a 'plate'.
There are two possible routes to get from London Heathrow to Edinburgh by car. The first option is to take the M25 and then join the A1(M) at Junction 23 and then follow the A1 straight up to Edinburgh. The second options is to join the M25 for a junction then join the M40 up to Birmingham, the M42 past Birmingham, and then the M6 all the way up to Carlisle until it becomes the A74(M) at the Scottish border, and then join the A502 to Edinburgh.
It doesn't have a number. The A8 airport junction is between the Gogar and Newbridge roundabouts. If you're approaching from Edinburgh, join the A8 from the city bypass and head towards Glasgow. If you're coming from the north or west, join the A8 at the Newbridge roundabout and head towards Edinburgh, then follow signs for the airport.
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