Abbreviation | Meaning |
---|---|
A | Amp |
CCT | Circuit |
CCU | Cooker Control Unit |
CCU | Consumer Control Unit |
CPC | Circuit Protective Conductor |
CPD | Circuit Protective Device (MCB) |
CU | Consumer Unit |
DB | Distribution Board |
EIC | Electrical Installation Certificate |
EEBADS | Earthed Equipotential Bonding And Automatic Disconnection Of Supply |
ELV | Extra Low Voltage = Below 50V AC \ 120V Ripple Free DC |
FCU | Fused Connection Unit |
FELV | Functional Extra Low Voltage |
HBC | High Breaking Capacity |
HRC | High Rupturing Capacity |
HV | High Voltage |
kV | Kilovolt |
kW | Kilowatt |
LV | Low Voltage = 50V - 1000V AC \ 1500V Ripple Free DC |
mA | milliampere |
MCB | Miniature Circuit Breaker |
MCCB | Moulded Case Circuit Breaker |
MD | Maximum Demand |
MEB | Main Equipotential Bond (old term, see MPB) |
MEW | Minor Electrical Works (certificate) |
MICC | Mineral Insulated Copper Cable aka Pyro |
MPB | Main Protective Bond |
PAT | Portable Appliance Testing |
PELV | Protected Extra Low Voltage |
PEN | Protective Earthed Neutral |
PFC | Prospective Fault Current |
PIR | Periodic Inspection Report, or Passive Infra Red |
PME | Protective Multiple Earthing |
PSCC | Prospective Short Circuit Current |
PVC | Poly Vinyl Chloride |
R | Resistance |
R1 | Resistance of a phase conductor of a distribution or final circuit |
R2 | Resistance of a CPC of a distribution or a final circuit |
RCBO | Residual Current Breaker With Integral Overload Protection |
RCCB | Residual Current Circuit Breaker |
RCD | Residual Current Device |
SELV | Separated Extra Low Voltage |
SRCBO’s | Socket Outlet Incorporating RCBO’s |
SWA | Steel Wire Armour (Cable) |
U | Voltage between Phases |
Uo | Nominal Phase Voltage (to earth for TN systems) |
Uoc | Open circuit voltage at the supply transformer |
UPS | Uninterruptible Power Supply |
V | Volt |
VD | Voltage Drop |
W | Watt |
Z | Impedance |
Ze | Earth Fault Loop Impedance External to the installation |
Zs | Earth Fault Loop Impedance |
Zdb | Earth Fault Loop Impedance to the distribution board |