LafayetteEngineer
New member
- Location
- Lafayette, AL
Hello,
I currently have a joystick that contains four 3 position switches, that is hooked up to an Intrinsically Safe input barrier. Currently each of the four switches shares 1 common wire going through both the NO and NC terminals. I was wondering if this would cause the system to not be Intrinsically safe, since there is one common shared all switches, instead of one common for each 3 position switch. My thinking is that if there was a short for whatever reason, wouldn't it theoretically increase the current by a factor of 4 and cause a spark? I could not find any information in the NEC handbook on this, and I just wanted to verify that I am thinking correctly.
I currently have a joystick that contains four 3 position switches, that is hooked up to an Intrinsically Safe input barrier. Currently each of the four switches shares 1 common wire going through both the NO and NC terminals. I was wondering if this would cause the system to not be Intrinsically safe, since there is one common shared all switches, instead of one common for each 3 position switch. My thinking is that if there was a short for whatever reason, wouldn't it theoretically increase the current by a factor of 4 and cause a spark? I could not find any information in the NEC handbook on this, and I just wanted to verify that I am thinking correctly.
