why we are using perforted cable tray for control cable and
ladder tray for power cable



why we are using perforted cable tray for control cable and ladder tray for power cable..

Answer / rezvanian

Due to the high current flowing through the power cable
that warms the cable and its temperature rises so we use
ladder tray for power cable and the temperature of the
power cable can be exchanged with the surroundings.
We cant use ladder tray for control cables because the
control cables have high bending capability ( flexibility)
which is dropping belly ( belly bend downward ) and the
control cables temperature is always near the ambient
temperature and the perforated cable tray is suitable.

Is This Answer Correct ?    14 Yes 3 No

Post New Answer

More Instrumentation Interview Questions

pressure gauge measure static pressure or dynamic pressure?

3 Answers  


Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

0 Answers   CCIE,


What is Actuator?

3 Answers   Descon,


WHAT IS THE VALUE OF MICRON

2 Answers  


key phaser where is use and work

0 Answers   BAP,






i have level transmitter -400 to 0 range for steam drum application but i am unable to calibrate if installation of lt below lower tap what will be the effect ? and as per std wht is location of lt ,above lower tapping or below

1 Answers  


can i use 1 sq mm insted of 1.5 sqmm cable cable length 600 mts under ground laying Cable carrying 24 vdc 4-20ma current

2 Answers  


Why 250 or 500 ohm load resistance is use in any transmitter

2 Answers  


How to convert milliampares into flow??

0 Answers  


What is loop1 and loop2 in MTS LT?

0 Answers  


how to wire from pressure transmitter to marshalling panel and panel to controller and controller to dcs plz give the answer with example .

2 Answers  


How much flow is passing through 6 inch line? There are no gauge, no any transmitters in line.

3 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)