I dont know how many times I have seen the scam service call where only the company that the supplied the equipment can change and reassign a burned processor output because they have a password on their processor to protect their own intelectual property rights. Jerks couldnt design the system...
Have recurring faults from AB 1336 impact drives.
The faults are occurring on two diferent machines.
One machine has 2 drives and the other has 3.
These machines are enviromental test cells which mostly test automotive parts.
The loads on the drives are very light usually but the test durations...
If it is metal and could become live above ground than it needs to be grounded. common sense.
Look at all those metal enclosures they used for traffic light controls and power in toronto. The ones that were flush mount on the sidewalk are the biggest problem.Salt gets in and degrades the wires...
I searched my code book for 2hrs the other night trying to find an old rule regarding the use of solid wire in conduit.
Maybe someone can help me here.
I think I read in my old Canadian code book years ago that you cannot use solid wire in pull elbows. But I cannot find any reference to it in my...
not a plc solution but simple just the same.
Use the outputs from the logix that drive the actuators to instead drive some timing relays. Use the timing relay outputs to drive the actuators for 2 seconds longer than normal and then release.
The timing relay contacts would have to be normally...
dbaec is this a cooking hood?
Every kitchen exhaust system I have ever worked on has had the gas burners for the heat source interlocked with the exhaust fan. Either by a relay and overload combination or an air proving switch of some sort. The exhaust system is turned on manually when needed...
not sure what rule to point you to but I bet you can read the book yourself.
Butt splices aren't a bad thing. It just depends on your preference. Do you want pretty or practical?
And what size of wire are we talking about? Power conductors or controls?
As far as I know a butt splice is an...
In the kitchen there is a wall mounted switch wired in parallel with a temperature switch in the hood?
Hood sensor?
What kind of control system do you have?
Sometimes the obvious is the real answer.
Residual heat. Bouncing control switches. Huh?
turn that exhaust fan on manually and leave it...
If the secondary neutral is connected to ground, and there is a short of one secondary phase to ground (an no load current in the other phases), then there will be no fault current.
Huh? You present a short circuit path to the t/f secondary phase voltage and you expect no current? This current...
it seems you are quite intent on putting something in front of the panel doors. I see it all the time. If you dont have to service something very often in there then go ahead. You probably will anyways. The rules are the same in Canada and the US. If you require emergency access to a main...
This is an old post.
Cheesy wiring indeed.
Real amateur work. Was the Inspector blindfolded when he came by?
Code violations aside. How does one easily modify or remove any one disconnect?
A D box and some 1/2" sealtite flex would have been much easier. Probably faster install as well.
Oh well...
The cct may have been used for night lighting perhaps?
It's been 45 yrs since the original install and lighting changes and modifications to switching may have occurred.
It was, and still is, common practise to use row mounted light fixtures as raceways for auxiliary lighting circuits within the...
Has anyone forgotten "transformers 101." Correct me if I am wrong but isn't the purpose of insulating the laminations from one another to REDUCE the effect of EDDY currents and their damaging heating effects?
"The steel beam supporting the laminations is grounded but insulated from the...
Goe with what Barry says.
The start/stop cct probably is already stepped down to a lower control voltage, say 24VDC or 120VAC. Just wire the photoeye output (or dry contact) in "series" with a "Detented" E-stop button.
pretty painless me thinks
skiier
any e-stop than requires the interface of "software" or anything other than a hardwired button is extremely dangerous. I am not sure about radio control but I am sure that whatever device you use should be "redundant". Radio controls are out of the range of my experience but I am quite sure that...
Been an Electrician in Ontario for 18yrs. 600/347 is THE standard in Canada. Most car plants I have been in use 600V and step down 480v for American equpiment. Yes that's right a step down T/F. I have never seen a 480v "BUS" in any car plant in Canada. I may be wrong on this point but I do not...
