Ametek Thermox Series 2000 WDG-IV User Manual page 57

Figure 3-19. sensor board.
sensor aC mains supply connections
Connections for AC mains supply to the sensor are labeled as follows:
L - Line Connection
N - Neutral (USA)
Chassis Stud -Equipment Ground (Protective conductor)
There is no power switch on the sensor, and it must be protected by in-
stalling it on a circuit protected line, maximum 15 amperes, with a switch
or circuit breaker in close proximity to the sensor and within easy reach of
an operator. Mark the switch or circuit breaker as the sensor disconnecting
device.
AC (L) and (N) markings are provided by the terminal block for connec-
tion of AC power. These markings are for reference purposes only, such as
for use on system wiring diagrams, etc. The system/product has or needs
no specific LINE or NEUTRAL connection for any function, safety or oth-
erwise. The (N) terminal is not internally grounded, nor needs to be. The
system will operate normally regardless of what AC input terminal (L or
N) the AC Line or Neutral is connected to, or, if there is a Neutral used at
all (i.e., 208 VAC US power connection).
Installation | 3-25