electrical abbreviation and live wire scanner

Here are some electrical abbreviation that will help you on electricity components and how to construct live wire scanner device.


PT:  potential transformer

CT:  current transformer

HV:  high voltage

HP:  horsepower

HRC: high rupture capacity fuse

AH:  ampere hour

XLPE: cross linked polyethylene

SWA:  single wire armored

CB:   circuit breaker

PVC: polyvinyl chloride

CCR: central control room

CAD: computer aided design

CBCU: circuit breaker control unit

AVR: automatic voltage regulator

ACSR: al conductor steel reinforced

UPS: uninterrupted power supply

AWA: aluminum wire armor

TB: terminal block

LV: low voltage

JB: junction

NC: normally close

NO: normally open

V: voltage

OLR: overload relay

OLTC: on load tap changer

OLP: overload protection

BS: British standard

DB: distribution board

RPM: revolution per minute

Q: charge

I: current

C: capacitor

XC: capacitance of the capacitor

XL: capacitance of inductor

LED: light emitting diode

R: resistance

P: power

E: electromotive force

Electrical installations: live, neutral, earth

Electricity is an extremely convenient and clean source of power. electricity is distributed throughout the whole world by a nationwide system of power stations, interconnected by cables and other necessary appliances such as transformers or grid system. Note: the domestic supply of electricity are not the same it varies according to the current your are living.

The domestic supply of electricity in some country is 220/240 a.c. which come from local substation with three cables such as live (L), neutral (B) and earth (E).


Here are the simple techniques on how to draw and design live wire scanner.

Live wire scanner is a simple circuit that lets you scan a 220v live wire.

The working principle of the circuit above.


The clock input of the IC is connected to a wire, which acts as the sensor. Here ,we used 10cm length 22SWG wire as the sensor. Note: when you hold the sensor, metallic copper or conductor  wire close to the live wire, electric field from mains activates the circuit.

The input impedance of the CMOS IC is high, the electric field induced in the sensor  is sufficient to clock it. The output at pin 11 of CD4017 drives the LED, they by flashing of the LED1 and LED2 indicates the presences that the scanner is active.

However, the circuit can be used to find stray leakage from electrical appliances like mixers, refrigerators and fans etc. also, it can be easily assembled on any general purpose board or the discrete components can be directly soldered on the IC.

Then, A 9v PP3 battery power the circuit. Note: if you use a mains adaptor, make sure that it is well regulated and isolated; otherwise, even the stray electric field from mains transformer will clock the circuit as shown above.


electrical abbreviation  and live wire scanner are the abbreviation used in electrical workshop and company’s which make engineering a very unique environment.

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