What is are the procedures for inspection of an electrical motor before its installation?
1. Visual and Mechanical Inspection
- Compare equipment nameplate datawith drawings and specifications.
- Inspect physical and mechanical condition.
- Inspect anchorage, alignment, and grounding.
- Inspect air baffles, filter media, cooling fans, slip rings, brushes, and brush rigging.
What is testing and inspection in electrical installation?
In layman’s terms Inspection and Testing is the testing procedures that electricians use to ensure that a circuit is working correctly and safe for use before being energised. … Inspection and testing should also be carried out for all electrical installations at regular intervals.
What is the first thing to do in testing any motor?
To begin an evaluation, check in first on the basic measures of motor performance: current levels, power, voltage, and resistance. Preliminary tests are generally done using the ubiquitous multimeter, which can provide diagnostic information for all kinds of motors.
What piece of equipment do you use to test for an electrical current?
Multimeters come with black and red lead testers attached to the ends of wires. These probes can be held against battery terminals or inserted into outlets for testing. One multimeter can do the work of three tools. It can be a voltmeter that measures voltage or an ammeter that measures current.
What electrical tests must be carried out?
4 test instruments most frequently used by electricians
- Continuity tester.
- Insulation resistance tester.
- Earth fault loop impedance tester.
- RCD tester.
How do you test if an electric motor is bad?
With a multimeter set to low ohms (usually 200), test between each winding terminal and the metal casing of the motor. If there is any reading on any of these then the motor is bad, do not use it. You may find that when it runs ungrounded that the casing becomes live at up to supply voltage.
How do you service an electric motor?
Every 6 months
- Clean motor, blowing out dirt from windings, and wipe commutator and brushes.
- Visually inspect commutator clamping ring.
- Check and replace brushes that are more than half worn.
- Examine brush holders, and clean them if dirty.
- Check brush pressure and position.
How do you test an electric motor with a voltmeter?
To test your motor for short to ground, you’ll need to set the multimeter to ohms and disconnect the motor from its power source. Then inspect each wire and look for infinite readings. Alternatively, if you get a reading of 0, you might have a cable issue.
What is done during an electrical inspection?
The electrical inspection will check on the: adequacy, suitability and serviceability of your electrical appliances. For example, it will check the switches, sockets and light fittings; check for any damages and make sure there are adequate signs and notices.
How often should you have an electrical inspection?
To maintain adequate safety standards, periodic testing and inspection should be carried out as follows: Every 5 years, at least, for businesses. Every 5 years, or during every change of occupancy, for tenanted properties. Every 10 years, at least, for private homes.