Hi all, looks like a great site. I have a question concerning a system(s) that may require low-voltage certifications. Maybe someone can help me here.
System 1- The idea would be to monitor cycles of a drill press or other shop machines on a computer or digital counter. To accomplish this:
-Open the panel of the drill press and identify the switch that cycles the machine. This switch can be either 24v, 110v, or 220v depending on the make or brand of the machine.
-Find the switched side of (typically) a 4 pole switch and jump wires from that switch to the input side of a relay board that we install in the panel of the drill press.
-The ouput side of the relay board (signal) is then run to a board outside of the machine with a communication jack.
-From that board and or jack, run a communication cable, that plots on/off signals on the computer or digital counter.
System 2-
Divert machine coolant flow:
-Mount a 110v to 24vac transformer box in a remote area. Run an 18/4 cable 50' or so (depending on where 110v is available) from that transformer box to a connector (plug) that we would attach the 4 wires on site.
- Plug that connector to its mate (a factory wired cable) for easy disconnect if machine is moved. That cable is plugged into a on/off switch box mounted on the machine.
-From that on/off switch box we would run two wires and wire nut them to a 24v solenoid that operates a mechanical valve to divert coolant, right or left, on an old milling machine or other shop equipment.
The question: In states that require ?power limited certification? or ?low-voltage cert? for certain work, would either of these two systems need such a license? If so, does that mean one time installs require a license or only if you market them. Thanks.
System 1- The idea would be to monitor cycles of a drill press or other shop machines on a computer or digital counter. To accomplish this:
-Open the panel of the drill press and identify the switch that cycles the machine. This switch can be either 24v, 110v, or 220v depending on the make or brand of the machine.
-Find the switched side of (typically) a 4 pole switch and jump wires from that switch to the input side of a relay board that we install in the panel of the drill press.
-The ouput side of the relay board (signal) is then run to a board outside of the machine with a communication jack.
-From that board and or jack, run a communication cable, that plots on/off signals on the computer or digital counter.
System 2-
Divert machine coolant flow:
-Mount a 110v to 24vac transformer box in a remote area. Run an 18/4 cable 50' or so (depending on where 110v is available) from that transformer box to a connector (plug) that we would attach the 4 wires on site.
- Plug that connector to its mate (a factory wired cable) for easy disconnect if machine is moved. That cable is plugged into a on/off switch box mounted on the machine.
-From that on/off switch box we would run two wires and wire nut them to a 24v solenoid that operates a mechanical valve to divert coolant, right or left, on an old milling machine or other shop equipment.
The question: In states that require ?power limited certification? or ?low-voltage cert? for certain work, would either of these two systems need such a license? If so, does that mean one time installs require a license or only if you market them. Thanks.
