simple TV coax DIY leads to electricity issues??..

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cyril7

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#747341 19-Jan-2013 12:49

gregmcc:
Niel: No, I did not look at the cable actually. How about a) then, equivalent of double insulation i.e. 2 layers?

It is not hard to find 1500V dielectric, 300V rated network cable. For example http://www.pacificcable.com/Cat_6_Tutorial.htm
The rated voltage is continuous. The dielectric rating is safety in brief overvoltage due to surges, lightning, etc. The company I work at makes electric fence energizers which output 10,000V but still needs a dielectric withstand voltage test primary to secondary.

Another one:
http://www.drakauk.com/products/special_cables/special9.php
1000V dielectric

Given that Cat6 has an extra shield and plastic layer and jacket thicker than the internal wires insulation, I do not see issue.

You also get specialist cables like a so called pink cable rated over 3000V dielectric withstand.

The shield in cat6 is effectly a current carry conductor so that rules out the double insulation, and i've yet to see a cat5/6 cable that is stamped with the markings that it meets the standard for LV installation

Hi, yes there is cat5e/6 cable that is rated (and noted so) for LV installations, I have used quite a bit of it in remote metering installations in apartment blocks, also the pink C-Bus cat5e is LV rated.

http://www.cbus-shop.com/product_info.php?products_id=51

Cyril

gregmcc

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#747342 19-Jan-2013 12:59

cyril7:
gregmcc:
Niel: No, I did not look at the cable actually. How about a) then, equivalent of double insulation i.e. 2 layers?

It is not hard to find 1500V dielectric, 300V rated network cable. For example http://www.pacificcable.com/Cat_6_Tutorial.htm
The rated voltage is continuous. The dielectric rating is safety in brief overvoltage due to surges, lightning, etc. The company I work at makes electric fence energizers which output 10,000V but still needs a dielectric withstand voltage test primary to secondary.

Another one:
http://www.drakauk.com/products/special_cables/special9.php
1000V dielectric

Given that Cat6 has an extra shield and plastic layer and jacket thicker than the internal wires insulation, I do not see issue.

You also get specialist cables like a so called pink cable rated over 3000V dielectric withstand.

The shield in cat6 is effectly a current carry conductor so that rules out the double insulation, and i've yet to see a cat5/6 cable that is stamped with the markings that it meets the standard for LV installation

Hi, yes there is cat5e/6 cable that is rated (and noted so) for LV installations, I have used quite a bit of it in remote metering installations in apartment blocks, also the pink C-Bus cat5e is LV rated.

http://www.cbus-shop.com/product_info.php?products_id=51

Cyril

Which it correct, but this is a product specifically desgined to be run with other LV cable, you bog standard cat5 isn't, same for TV coaxial cable

Toledo

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#747402 19-Jan-2013 16:12

Jaxson:
timbosan:
I generally remove a square or rectangle around the nogs, and again near studs (for face plates) then simply patch it up, fill the gaps, and repaint.

In a rush, I've seen this done with a chainsaw. Just notch the dwang, forming a small slot by running down with the tip of the chainsaw blade, sit the coax into this and repatch with filler. Rough, yep.

Did nobody else see this? Amazing what a bit of kiwi ingenuity can do huh?

My opinions are purely my own and are not at all those of my employer 2degrees.

Niel

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#747461 19-Jan-2013 17:57

cyril7: And to the poster that said that AS/NZ3000-2007 is out of date, this is incorrect, there are several ammendments, but its still the current standard.

Not according to a friend who holds an electrical certificate and tells me that is what the trainer said at the last refresher course. Apparently 2007 is already superseded, it is beyond the transition period.

You can never have enough Volvos!

Brunzy

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#747641 20-Jan-2013 09:33

According to Standards it is still current , with a new hard copy due out 'early in 2013'

gregmcc

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#747645 20-Jan-2013 09:40

Brunzy: According to Standards it is still current , with a new hard copy due out 'early in 2013'

The electrical safety regulations 2010 (The law), refer to AS/NZS 3000:2007, not 2010, 2010 may be the newest standard but the law says refer to 2007!

Official standards referred to in regulations AS 4777.1 AS 4777.1:2005: Grid connection of energy systems via inverters—Part 1: Installation requirementsAS/NZS 1677.2 AS/NZS 1677.2:1998: Refrigerating systems—Part 2: Safety requirements for fixed applications: including Amendments 1 and 2AS/NZS 2500 AS/NZS 2500:2004: Guide to the safe use of electricity in patient careAS/NZS 3000 AS/NZS 3000:2007: Electrical installations (known as the Australian/New Zealand Wiring Rules): including Amendment 1 and Amendment A

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cyril7

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#747647 20-Jan-2013 09:41

Hi, AS/NZ3000-2007 with amendment A IS still the current issue, I sit on a couple of technical standards committies in this area and can confirm its the latest.

Edit, and yes I also hold Electrical Registration, recently be refreshed :)

Cyril

Bung

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#748711 22-Jan-2013 11:48

cyril7: Hi, AS/NZ3000-2007 with amendment A IS still the current issue, I sit on a couple of technical standards committies in this area and can confirm its the latest.

Cyril

AS/NZS 3000:2007/Amdt 2:2012 is out but has to wait for the Regulations to be updated before it becomes legally enforcible.

thetree13

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#750027 24-Jan-2013 10:00

Amazing how one simple question can segway in to a battle of knowledge of a mostly unrelated issue.

Thanks everyone for your advice and input.. my problem has now been resolved.. good old fashioned kiwi ingenuity got em in the end.. haha.. i win!

cheers

bmoff

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#750034 24-Jan-2013 10:14

Even more amazing is that the question has now SEGUED into the topic of gyroscopic personal
transportation devices!

ubergeeknz

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#750039 24-Jan-2013 10:22

thetree13: Amazing how one simple question can segway in to a battle of knowledge of a mostly unrelated issue.

Thanks everyone for your advice and input.. my problem has now been resolved.. good old fashioned kiwi ingenuity got em in the end.. haha.. i win!

cheers

See, when you're talking about mains voltage, and "kiwi ingenuity" together, it makes people concerned. Hence the discussion around safety regulations.

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