Connecting two 12-volt batteries in series adds their individual voltages together to create a 24-volt battery pack. The series arrangement does not increase the capacity of the batteries.
Connecting the positive battery post to the negative post of a second battery and then connecting the leads of the load to the remaining two battery posts results in a series connection. This is the arrangement used in most flashlights, where the batteries stack on top of one another. Connecting a series battery pack to a device designed to operate on a single battery often burns out motors and sensitive electronic parts.
Connecting batteries in parallel increases the capacity of the batteries without increasing the voltage. The parallel connection indicates the positive post and negative post of one battery connect to their corresponding post on the second one. The load then connects to the posts of one battery. A parallel battery pack allows the load to operate twice as long. Doubling both voltage and capacity of a battery pack requires connecting two two-cell series battery packs together in parallel.
Regardless of how batteries connect, it is essential to match their type and capacity. Differences in battery chemistry result in differences in battery voltage. These differences in capacity cause one battery to drain the second below the normal level. As a result, the over-drained battery is often unable to recover from the deep discharge, shortening its life.Learn More
A 12-gauge wire can carry between 15 and 20 amps for normal electrical wires. When wiring chassis, 12-gauge wire can carry a maximum of 41 amps along the metal conductor. The conductive part of a 12-gauge wire is 0.0808 inch in diameter. This gauge is found in extension cords.Full Answer >
The use of two-wire resistance temperature detectors with three- or four-wire instrumentation depends on the application, as this configuration adds additional uncompensated resistance to the system and seriously impairs the accuracy of the RTD. Consult the manufacturer for the proper RTD to use with its instrumentation for specific applications.Full Answer >
To wire a two-way dimmer switch, you need a neon voltage tester, a flat-head screwdriver, needle-nose pliers and a dimmer switch. A two-way dimmer switch you can control the light from two different locations.Full Answer >
To wire a three-way switch system where two switches control the same receptacle, you need a few items, less than one hour of time and basic electrical know-how. First, you need two three-way switches, some three-wire cable with a ground wire, some two-wire cable with ground to go between the last switch and the receptacle, the two-wire cable attached to the circuit you are putting the receptacle on and the receptacle itself, in this case a light and fan.Full Answer >