For those of you in Ontario, this query is similar to the forum member who asked about CSA.
I will be calling on ESA to come and inspect the machine I am retrofitting, it's an old clunky thing in a basement laboratory. Not in a factory, nor in a traditional automation environment and it won't be used by the general public. (not that that matters).
I am putting a new control system on it. I haven't had an ESA guy come to do this in about 6 years so I'm wondering what, if anything, has changed.
Would really like to know before I start putting the system together. I am only interested in what ESA will want to see, not CSA.
The system is basically a control box with a 110 V feed, a power disconnect switch, containing a 110 V powered 24 V DC power supply and a PLC which is powered by 110 V.
The PLC has relay outputs which send 110 V out to energize some solenoid valves.
All inputs and the HMI are 24 VDC. The HMI will be in a wall-mounted box.
My questions are:
1. Do I fuse both the hot and neutral going to the power switch. I ask this despite what
I read in the CSA thread, because that's what the ESA guy wanted me to do 8 years
ago. And what about the neutrals going to the PLC and the DC power supply?
2. Do I ground the neutral. If so, is this done before or after the power disconnect
switch.
3. Based on what I saw in the CSA thread: "labeling fuse holder and connection terminal with wire gauge
and temperature (New) " I am thinking, JFC, when does it stop???? How are you supposed to put
all these labels on fuseholders and terminal blocks????? I hope like heck that ESA wouldn't care about
that.
Any tips would be most appreciated.
I will be calling on ESA to come and inspect the machine I am retrofitting, it's an old clunky thing in a basement laboratory. Not in a factory, nor in a traditional automation environment and it won't be used by the general public. (not that that matters).
I am putting a new control system on it. I haven't had an ESA guy come to do this in about 6 years so I'm wondering what, if anything, has changed.
Would really like to know before I start putting the system together. I am only interested in what ESA will want to see, not CSA.
The system is basically a control box with a 110 V feed, a power disconnect switch, containing a 110 V powered 24 V DC power supply and a PLC which is powered by 110 V.
The PLC has relay outputs which send 110 V out to energize some solenoid valves.
All inputs and the HMI are 24 VDC. The HMI will be in a wall-mounted box.
My questions are:
1. Do I fuse both the hot and neutral going to the power switch. I ask this despite what
I read in the CSA thread, because that's what the ESA guy wanted me to do 8 years
ago. And what about the neutrals going to the PLC and the DC power supply?
2. Do I ground the neutral. If so, is this done before or after the power disconnect
switch.
3. Based on what I saw in the CSA thread: "labeling fuse holder and connection terminal with wire gauge
and temperature (New) " I am thinking, JFC, when does it stop???? How are you supposed to put
all these labels on fuseholders and terminal blocks????? I hope like heck that ESA wouldn't care about
that.
Any tips would be most appreciated.