Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Why many cables are constructed of 7 cores with 7 strands ?

Status
Not open for further replies.
D

DrWhoF

Advanced Member level 1
Joined
May 6, 2005
Messages
402
Helped
24
Reputation
48
Reaction score
11
Trophy points
1,298
Activity points
4,388
Magic 7

Why many cables are constructed of 7 cores and each core has 7 strands?
Is it because 7 is a lucky number?

DrWho
 

E

echo47

Advanced Member level 5
Joined
Apr 7, 2002
Messages
3,942
Helped
638
Reputation
1,274
Reaction score
89
Trophy points
1,328
Location
USA
Activity points
33,176
Magic 7

Grab a handful of equal-size round coins. Try arranging them into a nice compact pattern. How many coins did you use? ;)
 

I

IanP

Advanced Member level 5
Joined
Oct 5, 2004
Messages
7,942
Helped
2,311
Reputation
4,624
Reaction score
531
Trophy points
1,393
Location
West Coast
Activity points
66,416
Re: Magic 7

Arguably, I would say that in this case 6 is the magic number ..
Stranding is based on the recognition that for circles of equal diameter, 6 will almost exactly fill the space around 1; next, one can see, that 12 fill the space around 6, 18 around 12, and so on ..
So, one needs to add 6 to the number in the outer ring each time to fill the next ring ..

Regards,
IanP
 

    D

    DrWhoF

    Points: 2
    Helpful Answer Positive Rating
G

GonzoEngineer

Newbie level 5
Joined
Jan 15, 2006
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,356
Re: Magic 7

Seven strand planetary stranders are much cheaper.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top