abbreviations

[guinnessgixer]

Really enjoy surfing the site and reading old and current threads, one thing i have noticed are there are a lot of abbreviations to industry and material words, sometimes this slows me down a little as i have to sit and work it out, can anyone throw a little light on some of them, it might help a few of us newbies,

thanks......ttfn

 

[Paul.M]

List of Electrical Abbreviations
A ampere [unit of electric current]
BC bayonet cap or bayonet connector [type of light bulb fitting secured by way of opposing pins on the base of the bulb]
BGB big green book – IEE/IET Wiring Regulations, 17[SUP]th[/SUP] edition, Amendment 1 (BS 7671:2011) green cover.
BRB big red book – IEE/IET Wiring Regulations, 17th edition (BS 7671:2008) red cover.
Ca correction factor for ambient temperature
CCU Customer Consumer Unit
CENELEC European Committee for Electro-technical Standardisation
CFL compact fluorescent light
Cg correction factor for the grouping of cables
Ci correction factor for thermal insulation
Ct correction factor for conductor operating temperature
CMD Construction, Management and Design Regulations
CNE combined neutral and earth [see also PEN]
cos 0 power factor [sinusoidal systems]
CPC circuit protective conductor
c.s.a cross-sectional area
DCUSA Distribution Connection and Use of System Agreement
De overall cable diameter
DNO Distribution Network Operator
EAWR Electricity at Work Regulations
ECA Electrical Contractors Association
EEBAD earthed equipotential bonding & automatic disconnection
EICR Electrical Installation Condition Report
ELCB earth leakage circuit breaker
ELV extra-low voltage (up to 50V AC)
Elecsa Electrical Self-Assessment - one of a number of electrical competent person schemes in the UK
EMC electro-magnetic compatibility
e.m.f. electro-motive force
EMI electro-magnetic interference
ES edison screw [screw in fitting arrangement for light bulbs]
f frequency
FCU Fused Connection Unit aka Fused Spur Unit
FELV functional extra-low voltage
FSU Fused Spur Unit aka Fused Connection Unit
GLS general lighting service - standard incandescent type of light bulb
GN guidance note
HBC high breaking capacity [fuse]
HRC high rupturing capacity [fuse]
Hz Hertz - unit of frequency
HV High Voltage
I symbol for electric current
I2 operating current [fuse or circuit breaker]
Ia current to operate protective device
Ib design current
Id fault current
IEC International Electrotechnical Commission
IEE Institution of Electrical Engineers
In current setting of protective device
It tabulated current
IP code related to the Ingress Protection rating system consisting of of the letters IP followed by two digits or one digit and one letter and an optional letter to indicate protection levels from variously sized solid objects of various sizes and liquids.
IR insulation resistance
IT earthing system
Iz current carrying capacity
k kilo - one thousand times
kV kilovolt [1000 V]
L1,L2,L3 line conductors of three-phase system
LABC Local Authority Building Control
LEF Luminaire Efficiency Factor (and proposed here as Lighting Efficiency Factor. LV Low Voltage.
m metre
m milli - one thousandth part of
M meg or mega - one million times
mA milliampere
MCB miniature circuit breaker
MCCB moulded case circuit breaker
MD maximum demand
MFT multifunction tester
MHMO Management of Houses of in Multiple Occupation (regulations)
m.i. mineral-insulated
MV Medium Voltage
NAPIT National Association of Professional Inspectors and Testers [one of a number of electrical competent person schemes in the UK]
NICEIC National Inspection Council for Electrical Installation Contracting [one of a number of electrical competent person schemes in the UK]
p.d. potential difference [the difference (measured in volts) between the electrical "potentials" experienced at two points in space.
PELV protective extra-low voltage
PEN protective earth and neutral [as describing conductors used for both functions, see also CNE]
PME protective multiple earthing
PIR either passive infra-red or periodic inspection report
PSC prospective short-circuit current
p.v.c. poly-vinyl chloride
R resistance [electrical]
Ra the total resistance of an earth electrode and the protective conductor connecting it to exposed conductive parts
REC Regional Electricity Company
Rp resistance of a person's human body
RCBO residual current circuit breaker with overload protection
RCCB residual current circuit breaker
RCD residual current device
r.m.s. root-mean-square [effective value]
s second [unit of time]
S conductor cross-sectional area
SBC small bayonet cap
SELV seperated extra-low voltage
SES small edison screw
SPD Surge Protective Device
SWA Steel Wire Armoured cable
t time
TB termination block
TN-C earthing system
TN-C-S earthing system
TN-S earthing system
TT earthing system
U symbol for voltage [alternative for V]
Uac voltage (alternating current)
Udc voltage (direct current)
UKPN UK Power Networks - distribution network operator for electricity covering South East England
SI Statutory Instruments (UK)
SI Système International - unit system
Uo phase voltage
V volt [unit of e.m.f. or p.d. - the difference (measured in volts) between the electrical "potentials" experienced at two points in space]
Vac volts (alternating current)
Vdc volts (direct current)
W watt [unit of power]
X reactance
Z impedance [the measure of opposition to alternating current]
Ze earth loop impedance external to installation
Zs earth fault loop impedance
0 phase angle

 

[Marvo]

The last on on the list (phase angle) is abbreviated as θ.

 

[guinnessgixer]

brilliant!! thanks for your time!, that will get copy, pasted and printed out

 

[Rampage]

Amazon have a free Electrical Dictionary for the Kindle. You can also get a Kindle app for iPad / iPhone etc.

http://www.amazon.co.uk/Standard-El...JJBK/ref=sr_1_1?ie=UTF8&qid=1349959050&sr=8-1