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The clamp part is for measuring amps via induction. You set meter to amps and clamp around only a single wire. Device you are measuring must be operating. This means you couldn't clamp around a lamp cord to a table lamp since the current induced in each direction cancels out. You would have to separate the wires. An electrician would carry a short extension cord with the wires already separated. Most often a clamp meter is use to checks amps in a breaker panel on the black wire coming from the breaker.
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Why Do not clamp live plus neutral cable in Clamp meter?
A clamp-on meter works by measuring the magnetic field set up around a conductor. Because the currents in the line and neutral conductors flow in opposite directions, their fields cancel and the clamp-on meter has nothing to monitor. So it must be placed around either the line OR the neutral conductor -not both!
What are the basic test instruments in electricity?
A "multimeter" to test resistances, voltages, amperages. An external "clamp" meter to measure high ac currents. A "mega" meter to test insulation.
What is easier to measure volts amps or watt?
If you have the right test equipment amps are the easiest to measure. A slip over the wire amp meter is easier to use than a clamp on amp meter. The other two values have to be measured by using test leads from the test equipment.
How do you identify nutral and earthing wire if they change?
Making a load On, By using a clamp meter for measuring the current in the wires : we find a reading in Amps. if we clamp the neutral wire. and zero when clamping the earthing wire.
Can you measure amp in the DC?
Yes but the meter has to go in series with the load. There is a new clamp on amp meter being introduced, that will measure larger DC amperages without opening the circuit.
