sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring Shielded Cabling - info please

But you all seem to be saying that shielded does not do that - is that right ?

Yeah, it does but it has to be grounded.

By the way, I understand the grounding the shield, but what's bonding ?

The same thing only different. There have been books written on the subject so it can get quite complicated. Probably the one thing that simplifies it for you is the fact that you are aboard ship so you don't have to be concerned with power line neutrals and grounding electrodes.

The simplified explanation of bonding means that all pieces of equipment that are supposed to be grounded are tied together. On land this would all go back to one central point which would be the electrical service entrance neutral from the street which would be bonded (connected) to the water service line (if it's metallic) and also two or more driven ground rods or possibly a ufer ground. The ground rods are there only for lightning protection.

But again your only concern aboard ship is to see that your equipment grounds (and your shields) are connected to the larger electrical grounding system.

-Hal

Many thanks once again.

Final point then, how do I go back to these people and try to convince them that pulling CAT6 ScTP is the wrong thing to do ?

A professional qualification would help...

I am looking at Bicsi - comments anyone...

By the way, I must add that you chaps really are very good to give up your time to help. I can't tell you how much it means to be able to make progress with these questions...

Very best regards,

Neil

Neil,

Ungrounded FTP is WORSE than UTP. If you install FTP you MUST use the appropriate termination hardware (jacks and panels) and it all must be grouded. Otherwise, the shield becomes an antennae.

Regarding the patch cords... "ribbon" patch cords sounds an awful lot like "silver satin" cords. These are NOT data grade. Use patch cords of the same category listing as the cable and connectivity componenets.

Cheers,
HJB

Neil,

I agree with all the advice above. Sheilded cables must be bonded (Grounded) in order to perform to the standards that they were designed to meet. If not, you are going to introducing more noise or foreign interferences that will degrade your cable category.

As to your comment:
Final point then, how do I go back to these people and try to convince them that pulling CAT6 ScTP is the wrong thing to do ?

Just explain to them that this is why they make connectors, jacks and patch panels that have terminations for the sheild. Why else would they make them this way if it didn't matter.

Or, better yet, give them the address of this site, and let them see for themselves the answers to your questions.

Good Luck and welcome to the board.

Final point then, how do I go back to these people and try to convince them that pulling CAT6 ScTP is the wrong thing to do?

I don't think that we determined with any certainty the ScTP is the wrong way to go, just that if it is used it must be used with the appropriate grounding jacks and patch panels. Otherwise you are better off using unshielded cable.

-Hal

To you all -

Many thanks for all of the help and advice, you have opened my eyes and helped me sort a clean signal out from the noise..:>)

OK, final question then we can all move on...

Re qualifications - something to help me back up my claims, there's Cisco network and data cabling course, bisci course or anything else ?

Thanks again to you all, this is a great forum, very welcoming and very helpful. I´ll be a regular, that's for sure.

Best to you all,

-Neil

BICSI covers all of that stuff. I would head in that direction. I don't know how they do things in Spain, but the local elctrician's union offers these classes at very reasonable prices.