What about just using a multimeter with super long lead; basically use an insulated cable as an extention to the meter leads? Measure the resistance of the meter leads then measure the resistance of the ground cable and the difference would be the ground cable we are interested in?
Does anyone know of a method to measure the resistance of a long ground cable that has been installed?
The cable in question is a bare 4/0 copper cable installed in the concrete of a conduit bank. The conduit bank is about 2km long (1.2 miles) and I have to ensure the resistance is low enough...
Has anyone attended (or know someone who has) the Medium Voltage Systems School put on by TMEiC?
I am looking for feedback and whether or not it's worthwhile to send employees in my department; it's attractive as you only have to pay travel and accomodations but worry they will just push their...
I am currently working on a proposal to replace three (3) medium voltage (MV) full voltage non-reversing starters (FVNR) with VFDs.
The motors are 1250hp, 4000V, induction machines connected to large blowers. The client would like to reuse the power cables feeding the motors but I have a...
Thanks,
I agree, the more I look into this problem the less I see sizing the generator as an issue.
For sizing I am going to plot the capability curve of the generator and compair it to the power locus of the hoist.
I think the problem I am going to run into is going to be the stability of...
The sum of all other loads is small compaired to the hoist load.
The Client does not plan on operating on standby power, only to get the men out of the mine, therefore no revenue.
I am employed by the consulting firm, and yes I will have to get someone involved who knows more then me on...
As a part of a project I am working on I have to size a generator.
The generator will be used as a standby power source, used only when utility goes down.
The primary function of this generator is to power a mine hoist to get men out of a mine. Secondary functions include dewatering pumps...
I am trying to find companies that manufacturer copper clad messenger cable.
The only company I have found so far is American Wire Group, and they seem to be just a distributor.
Thanks
Not in NEC land but have access to the NEC code and it states the same as the CEC.
As it stands the I am having a hard time getting this information from the cable manufacturer, figured when you plan on installing 6 runs of cable at 3200 ft per run they would be more helpful.
Anyways, I will...
Can anyone tell me if there is a standard or publication that goes into details for calculating the vertical lineal distance between cable clamps.
I need to confirm how many cable clamps I need for a vertically installed cable, vertical distance is approximatly 3200ft.
Thanks
Magnetic Forces on Cables During Fault
Can anybody explain the magnetic forces on a cable during a fault.
Trying to find information on single conductor cables installed in trefoil, single conductors installed with spacing, and three conductor cables.
Assuming this won't be an easy discussion...
Ok, I have been in talks with a materials guy at our company and he does not seem to think there is an issue with using 316.
First - He mentioned that since the shaft is a constant temperature the humidity will be non-condensating and therefore any of the chlorides will be in dry salt form and...
Currently I am working on a job that requires the use of 316 stainless support brackets in a potash mine (exposure to water, high humidity, potassium chloride, sodium chloride, and magnesium chloride)
The brackets are of a critical nature, basically if they fail the mine will be shut down for...
