Previous in Forum: Electrical substation   Next in Forum: Protection With CBCT
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
8 comments
Rate Comments: Nested
phillip
Associate

Join Date: Jul 2009
Posts: 49

cable rating

08/23/2009 4:23 PM

I would like to find out the cable current rating for a 185mm single core cable.PVC AND XLPE
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#1

Re: cable rating

08/23/2009 5:42 PM

Check here. There is more to it that just giving the area of the conductor.

http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=cable%20rating&srchobjs=t%2Cc&fs=12&order=asc
Register to Reply
Simon Wan
Guru

Join Date: Apr 2007
Posts: 577
Good Answers: 10
#2

Re: cable rating

08/23/2009 8:33 PM

At which voltage level. Low Voltage less than 1000V or High voltage?

__________________
 Management is just like a bunch of Monkey sitting on a tall tree. Some climb to the highest branch and some at the lowest branch. The highest Monkey look down and see a lot of happy faces but the lower Monkey looks up and see nothing but all the....
Register to Reply
Anonymous Poster
#4
In reply to #2

Re: cable rating

08/24/2009 8:12 AM

Low voltage.I would like to know the high voltage as well
Register to Reply
2
Simon Wan
Guru

Join Date: Apr 2007
Posts: 577
Good Answers: 10
#6
In reply to #4

Re: cable rating

08/25/2009 4:03 AM

For Low Voltage Cable Rating

LOW VOLTAGE CABLES

COPPER OR ALUMINIUM CONDUCTOR
XLPE INSULATED CABLES

CURRENT CARRYING CAPACITY IN AMPERES

A = pvc insulated non armoured

B = butyl, e.p. and silicon rubber insulated non metal sheathed cables

Sqmm

3 or 4 single core AC

1-3 core or 1-4 core AC

-----

A

B

-----

-----

A

B

-----

35 ----- 98 130 ----- ----- 72 100 -----
50 ----- 160 185 ----- ----- 125 150 -----
70 ----- 200 235 ----- ----- 155 185 -----
95 ---- 240 285 ---- ---- 190 225 ----
120 ----- 280 335 ----- ----- 215 260 -----
150 ----- 320 380 ----- ----- 250 300 -----
185 ---- 365 435 ---- ---- 280 345 ----
240 ----- 430 520 ----- ----- 335 400 -----
300 ----- 500 600 ----- ----- 390 460 -----
400 ---- 610 700 ---- ---- ---- ---- ----
500 ----- 710 800 ----- ----- ----- ----- -----
630 ----- 820 950 ----- ----- ----- ----- -----

For Medium and High Voltage Cable Rating

MEDIUM VOLTAGE CABLES 3.8/6.6 KV TO 19/33 KV
COPPER OR ALUMINIUM CONDUCTOR
XLPE INSULATED CABLES
A. SINGLE CORE CABLES

CURRENT CARRYING CAPACITY IN AMPERES

Sqmm

In Air

In Ground

Copper

Aluminium

Copper

Aluminium

Trefoil

Flat

Trefoil

Flat

Trefoil

Flat

Trefoil

Flat

35 152 170 117 132 154 160 119 124
50 182 203 140 158 182 189 141 146
70 227 254 175 198 222 231 172 179
95 274 313 211 240 264 275 204 212
120 318 360 244 278 300 314 232 242
150 360 410 278 316 335 352 261 272
185 410 470 330 365 376 399 294 309
240 481 560 380 435 428 464 339 360
300 545 640 430 498 472 525 379 407
400 625 750 500 585 517 600 427 468
500 700 873 570 685 553 684 465 537
630 784 1035 655 810 605 772 516 615

B. THREE CORE CABLES

CURRENT CARRYING CAPACITY IN AMPERES


Sqmm

In Air

In Ground

Copper

Aluminium

Copper

Aluminium

35 130 100 145 110
50 160 120 170 130
70 196 151 210 160
95 240 184 250 193
120 275 214 284 220
150 312 240 318 246
185 355 277 360 279
240 415 326 410 323
300 469 370 458 362
400 530 427 510 411

You have to take in to the consideration of your cable length, distance, methode of laying, voltage drop and the temperature factor of your country.

__________________
 Management is just like a bunch of Monkey sitting on a tall tree. Some climb to the highest branch and some at the lowest branch. The highest Monkey look down and see a lot of happy faces but the lower Monkey looks up and see nothing but all the....
Register to Reply Good Answer (Score 2)
No more Good Answers.
Anonymous Poster
#7
In reply to #6

Re: cable rating

08/25/2009 8:07 AM

hey thanks very much for the tables.
Register to Reply
jack of all trades
Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8777
Good Answers: 376
#5

Re: cable rating

08/24/2009 3:59 PM

Similar questions have been answered numerous times on CR4 (including by me recently). Here is the last one, covering cable size and de-rating factors (such as installation and insulation) which effect the current rating of a cable.

http://cr4.globalspec.com/thread/42202

Also try the (or any similar) cable manufacturer's website. They have the data there too.

__________________
 jack of all trades
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#8

Re: cable rating

03/19/2025 8:31 AM

...then start reading British Standard 7671.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Register to Reply
Have a Different Question?
8 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (3); jack of all trades (1); PWSlack (1); Simon Wan (2); wareagle (1)

Previous in Forum: Electrical substation   Next in Forum: Protection With CBCT
You might be interested in: Cable Laying Services, Cable Assemblies, Cable Trays

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (101 right now)
Show Members
Advertisement