Cable Forum - View Single Post - 100M What Kind of Ethernet Cable is best?

kwikbreaks · 31-10-2011, 16:12

A longer run of cable will certainly stand more chance of picking up more common mode RF noise as it will pass more sources and will act as a better MW antenna. It will also be more susceptible to internal crosstalk and that is what CAT6 is designed to reduce. For the most part kit designed to work with UTP will also be designed to reject common mode interference at the sort of levels most normal environments would cause.

I accept that in industrial environments with high power kit in use such as arc and RF welding gear some special measures will need to be taken - and they will be well beyond using CAT6 which is still UTP although of a margially higher grade than CAT5E.

What I don't accept is your example of a microwave oven is going to have any effect whatsoever unless it is faulty. Same for just about any other household equipment. Most UK homes won't be using runs anywhere near 100m either unless some very indirect routing is used.

31-10-2011, 16:12	#23
kwikbreaks Inactive Join Date: May 2010 Services: Plusnet FTTC, FoxSat HDR for TV, Vonage VOIP. Posts: 2,082	Re: What Kind of Ethernet Cable is best? A longer run of cable will certainly stand more chance of picking up more common mode RF noise as it will pass more sources and will act as a better MW antenna. It will also be more susceptible to internal crosstalk and that is what CAT6 is designed to reduce. For the most part kit designed to work with UTP will also be designed to reject common mode interference at the sort of levels most normal environments would cause. I accept that in industrial environments with high power kit in use such as arc and RF welding gear some special measures will need to be taken - and they will be well beyond using CAT6 which is still UTP although of a margially higher grade than CAT5E. What I don't accept is your example of a microwave oven is going to have any effect whatsoever unless it is faulty. Same for just about any other household equipment. Most UK homes won't be using runs anywhere near 100m either unless some very indirect routing is used.