To create a thermocouple one needs thermocouple wire, a means of spot welding the wire, and wire strippers. A thermocouple is used to measure temperature.
No. A thermocouple is made from two dissimilar wires. At the junction of these two wires, an electrical signal is generated that is measured in millivolts. If you insert another type of wire, such as copper, then you have introduced another electrical junction. Your signal will be (millivolt from junction 1 + millivolt from junction 2). <><><> Maybe. A thermocouple measures the temperature difference between the sensing junction (where the two different metal wires meet) and the other end of the wire, the reference junction. If you extend a thermocouple with copper wire, you will measure the temperature difference between the junction and the location where the copper extension is spliced on. If the copper splice is the same temperature as the reference junction, or if you can measure the temperature at the splice, then it will be fine. In general, it is better to run the thermocouple wire to the reference junction.
Yes as long as you use an approved splice, such as a wire-nut.
You must use thermocouple wire (of the same type as the thermocouple) to extend the circuit. If you switch to a different wire the point of connection between the two becomes a thermocouple junction itself, and the resulting voltage from that junction will skew your reading. You can use any wire to extend a thermocouple connection if you know the temperature of the junction where the thermocouple wire ends--this becomes the reference junction.
A wire splice is a specific type of connection between two wires that does not involve soldering.
A wire splice is the joining of two or more wires together. Commonly this is done with an approved wire joining nut. All slices are to be made in junction boxes to prevent fire should the wire splice become unserviceable.
Yes, you splice a small length of 16 gauge wire to 18 gauge wire for a repair.
rat tail splice western union splice
Splice uses stranded wires while joint uses solid wire.
The electrical code states that any splice in a wire, the insulation over the splice has to be equal to or greater than the insulation on that of the rest of the wire. So what ever type of splice that you use make sure that you insulate it well.
You can solder them after using a western splice connection. You can use a mechanical butt splice and you can connect the wires together with a wire nut after twisting the wires together. All you have to remember is that the insulation of the splice has to be equal to the wire insulation or greater.
200-300$ a pop <><><> A thermocouple is just two wires of different metals, joined at one end. If you know the wire materials for the type thermocouple you want, you can weld the tips together so the cost is in the wire. Fancier store-bought thermocouples can have color-coded wire, insulated junctions and other features that add to the price.