Tube Prune Abbreviations Page

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Abbreviations used on London Underground

London Underground has a long list of abbreviations and acronyms. Here are some.

Rolling Stock

Letters	Name	Notes
A/C.	Auto Coupler
A: COS.	Advert Light Cut-Out Switch	On cant rail in car
Auto.	Automatic
AWIC.	Audible Warning Isolating Cock

B	Battery	On cant rail in car
BAR	Brake Actuate Relay
BCI	Brake Control Interlock
BIC	Brake Isolating Cock	On cant rail in car
BIR	Brake Increase Relay
BPA	Brake Passenger Alarm
BPM	Brake Passenger Master
BRV	Brake Release Valve	On cant rail in car
BSA-B2	Brake Safety Repeater Relays
BTR	Brake Timing Relay

CIC	Coupler Isolating Cock	On cant rail in car
Com: COS	Compressor Cut-Out Switch	On cant rail in car
Com: G COS	Compressor Governor Cut-Out Switch	On cant rail in car
Com: G IC	Compressor Governor Isolating Cock	On cant rail in car
Con COS	Control Cut-Out Switch	On cant rail in car
Con G	Control Governor	On cant rail in car
CIC	Control Isolating Cock	On cant rail in car
CV	Coupler Valve	On cant rail in car
Cou: VIC	Coupler Valve Isolating Cock	On cant rail in car
CR	Coasting Relay
CS	Control Switch
CTBC	Combined Traction Brake Controller

DBVIC	Drivers Brake Valve Isolating Cock
DIC.	Door Isolating Cock	On cant rail in car
DM.	Driving Motor Car
DMVIC	Deadman Valve Isolating Cock
DV.	Door Valve	On cant rail in car

E:Cou.	Emergency Coupling Adaptor	On cant rail in car
EL	Emergency Ladder	On cant rail in car
EP	Electro-pneumatic
EPBIC	Electro-pneumatic Brake Isolating Cock	On cant rail in car

F	Fuses
FCOV.	Flow Cut Off Valve
FIC	Field Injection Contactor
FIS	Fault Isolating Switch
FIT	Field Injection Transformer
For.	Forward

GI-4	Grouping Contactors

IL.	Indicator Light	On cant rail in car
int.	Intermediate
IS.	Ice Scraper	On cant rail in car

LBI-2.	Line Breakers
LSR.	Local Supply Relay
LWR.	Load Weight Relay

MAR.	Motor Alternator Rectifier
MB.	Motor/Brake Switch
MCB.	Miniature Circuit Breaker
MG.	Motor Generator
ML.	Main Line
MLFIC.	Main Line Filtered Isolating Cock

NDM.	Non Driving Motor
NR.	Notching Relay
NR (aux).	Notching Relay Auxiliary

OLB/EFR.	Overload Braking/Earth Fault Relay
OLM.	Overload Motoring
OPR.	Off Proving Relay

PB 1-2.	Parallel - Braking Contactors
PCM.	Pneumatic Camshaft Mechanism
PS.	Position Switch
PWR.	Passenger Warning Relay

RBR.	Run Back Relay
RC.	Resistace Camshaft
Rev.	Reverser
RPA.	Rotary Pneumatic Accelerator
RPR.	Rheostatic Proving Relay
RPR (Aux).	Rheostatic Proving Relay Auxiliary Relay

S.	Sand	On cant rail in car
SAPB.	Spring Applied Parking Brake
SCD.	Short Circuiting Device	On cant rail in car
SD.	Series Diode
ST.	Special Trailer

T.	Trailer Car
TC.	Tripcock
TCCOS.	Traction Control Cut-Out Switch	On cant rail in car
TOIC.	Trip Cock Isolating Cock
TCIS.	Trip Cock Isolating Switch
TCPS	Tripcock Pressure Switch
TCRC.	Tripcock Resetting Cord
TEP.	Train Equipment Panel
TL.	Train Line
TLIC.	Train Line Isolating Cock
TR.	Test Relay
TVIC.	Triple Valve Isolating Cock	On cant rail in car

UIC.	Unit Isolating Cock
UNDM.	Uncoupling Non-Driving Motor Car
UNCOU.	Uncoupling Unit
UT	Uncoupling Trailer Car

VA.	Volt Amp relay
VLCV.	Variable Load Control Valve
VLV.	Variable Load Valve
VS	Vacuum Cleaner Socket	On cant rail in car

WIC.	Whistle Isolating Cock	In cab
WSI-2.	Wheelspin Relays
WS (Aux).	Wheelspin Auxiliary Relay
WWIC.	Window Wiper Isolating Cock

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