Carling
Technologies
Terminology
?
Terminology/Agency Approvals
Agency Approvals
Agency data
Single Pole (SP)
UL File #E7560
CSA File # LR9280
A switch device that opens, closes or
changes connection of a single
These marks are granted by national certification bodies for
use on products which comply with their specifications.
Double Pole (DP)
conductor in an electrical circuit.
A switch device that opens, closes or
changes connection of two
Agency
UL
Country
USA
Mark
conductors in an electrical circuit.
Single Throw (ST)
A switch that opens, closes or completes a
BEAB
United Kingdom
circuit at only one of the extreme
positions of its actuator.
Double Throw (DT)
A switch that opens, closes or completes a
circuit at both extreme positions
of its actuator.
Normally Open (NO) A momentary switch where one or more cir-
cuits are open when the switch actuator is
at rest (the normal position.)
Normally Closed (NC) A momentary switch where one or more cir-
cuits are closed when the switch actuator is
at rest (the normal position.)
CSA
VDE
TUV
SEMKO
NEMKO
Canada
Germany
Germany
Sweden
Norway
Power Rating
A switches current handling capability meas-
KEMA
Netherlands
ured in amperes, horsepower, lamp loads or
combinations thereof, in conjunction with
applicable voltage levels.
DEMKO
Denmark
L Rating
Denotes the ability of a switch to handle the
UTE(USE)
France
initial high inrush of a Tungsten Filament
T Rating
Typical European
Rating
Lamp on AC voltage only.
Denotes the ability of a switch to handle the
initial high inrush of a tungsten filament lamp
on AC or DC voltage.
16 (4) A 250V ~ T85 μ
SEV
OVE
IMQ
Switzerland
Austria
Italy
resistive
load
motor
load
amperage voltage
AC max. micro-gap
operating (<3mm)
CCC
China
amperage amperage
temp. in
centigrade
approved
FIMKO
Finland
Microgap (μ)
Bulb Life
European marking required for contact sep-
aration of less than 3mm.
Switches with microgap (μ) approval are not
acceptable as the safety
disconnect of equipment from the main
power source. The equipment
requires an additional means for safe dis-
connection from the main power
source such as a cord and plug.
Neon 25,000 hours
Incandescent 25,000+ hours
LED 100,000 hours
Lamp Characteristics Neon (120-240V) .002A Current Draw
Incandescent 6V .20A Current Draw
12-14V .08A Current Draw
18V .04A Current Draw
24-28V .04A Current Draw
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