The following technical information is provided as a supplement to the product manuals to help technicians properly install and maintain Noran Tel products.

Please click on the links below, these are Adobe PDF files, you may need to upgrade your version for free from Adobe's site.

1. Table 1: Allowable Ampacities for Single Copper Conductors in Free Air

2. Table 2: Allowable Ampacities for Not More than Three Copper Conductors in a Raceway or Cable **

3. Table 5A, B, C, D Correction factors for Table 1 and Table 2.

4. Recommended Torques Values for Common Bolt Sizes (PDF File)

5. Compression Lug Cross-reference Information (PDF File)

6. Fuse and Lug Ordering Information

** FYI: It has been Noran Tel's experience that our customers typically use type RW90 cable to distribute 24/48Vdc power to our fuse panels. RW90 is a rubber (thermoset) insulated cable suitable for use in raceways in dry or wet locations (similar to the U.S. "XHHW-2" or the "RHW-2", see the latest NFPA NEC and UL standards for U.S. requirements). RW90 has a 90�C maximum conductor temperature rating and is a very common and economical cable used by Telcos in Canada. With this in mind, most of our customers use the "RW90" column in Table 2 to determine maximum amperage for a given cable size. See the links below for information on purchasing the standards;

Canadian Electrical Code

National Electrical Code

Legal

Although Noran Tel believes the information provided on our website is correct, we can not and do not guarantee that it is. For electrical regulations as they pertain to your area, please check with your local Electrical Authorities for regulations that apply to your region and your specific application.

Warning: Installation and maintenance should only be performed by a trained technician experienced with DC power systems. Please carefully read the manual for the product you are using before beginning installation. If you have technical difficulties, please call Noran Tel at 306-721-3535.

If you find that any of the information provided on our web site is incorrect or incomplete, please contact Noran Tel and we'll review your feedback and update our information as necessary. Click here for e-mail.

The information provided has been extracted from the Canadian Electrical code and from other sources. With the permission of Canadian Standards Association, material is reproduced from CSA Standard, C22.1-98, title Canadian Electrical Code, Part 1, Eighteenth Edition, which is copyrighted by Canadian Standards Association, 178 Rexdale Blvd., Toronto, Ontario, M9W 1R3. While the use of this material has been authorized, CSA shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof.