Pocster Posted October 20, 2019 Share Posted October 20, 2019 These seem rather expensive for what they are . But using say ducting without the ‘lid’ seems equally not particularly cheap . Whilst I could use trays in the loft of my timber frame what do I use to ‘hang’ underneath from beam and block ? Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 20, 2019 Share Posted October 20, 2019 1 hour ago, pocster said: These seem rather expensive for what they are . But using say ducting without the ‘lid’ seems equally not particularly cheap . Whilst I could use trays in the loft of my timber frame what do I use to ‘hang’ underneath from beam and block ? Banding. All round band ( plastic coated ) is what we use, or you can run cables through open web pozi-joists where the two metal webs meet at the bottom. That’s classed as safe, as in the fire brigades interpretation, as in the cables can’t fall down and entangle one of our finest in the event of a fire. Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 20, 2019 Share Posted October 20, 2019 Tray is WAY OTT in a domestic situation, and still does not negate banding. Link to comment Share on other sites More sharing options...
Pocster Posted October 20, 2019 Author Share Posted October 20, 2019 (edited) 14 minutes ago, Nickfromwales said: Tray is WAY OTT in a domestic situation, and still does not negate banding. Nice . Post a link to screwyfix or something with banding ... Edited October 20, 2019 by pocster Link to comment Share on other sites More sharing options...
Russell griffiths Posted October 20, 2019 Share Posted October 20, 2019 2 hours ago, pocster said: Nice . Post a link to screwyfix or something with banding ... please. 2 Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 20, 2019 Share Posted October 20, 2019 Because you didn’t say please.... it’s a tool station link ✌️ Bingo 1 Link to comment Share on other sites More sharing options...
Pocster Posted October 21, 2019 Author Share Posted October 21, 2019 17 hours ago, Russell griffiths said: please. Yes my badness . I’ll blame the lack of manners on my man flu . thank you oh humble one ; much appreciated. May your armpits be infested with the fleas from a thousand camels ( Jeff Minter I think ) 1 Link to comment Share on other sites More sharing options...
Pocster Posted October 21, 2019 Author Share Posted October 21, 2019 17 hours ago, Nickfromwales said: Because you didn’t say please.... it’s a tool station link ✌️ Bingo Thank you ! Hmm - I suppose it could work . But I’m going to add cable as I go - don’t really want them sagging . Could just use slim lengths of osb as trays with timber either side to stop cables falling out . If that’s satisfactory m’lord ?! 1 Link to comment Share on other sites More sharing options...
PeterW Posted October 21, 2019 Share Posted October 21, 2019 1 hour ago, pocster said: Thank you ! Hmm - I suppose it could work . But I’m going to add cable as I go - don’t really want them sagging . Could just use slim lengths of osb as trays with timber either side to stop cables falling out . If that’s satisfactory m’lord ?! nope as it’s flammable so the cables would drop in the event of a fire. 1 Link to comment Share on other sites More sharing options...
Pocster Posted October 21, 2019 Author Share Posted October 21, 2019 14 minutes ago, PeterW said: nope as it’s flammable so the cables would drop in the event of a fire. Ah ! Even if just cat 5 cables ? Link to comment Share on other sites More sharing options...
Carrerahill Posted October 21, 2019 Share Posted October 21, 2019 21 hours ago, Nickfromwales said: Tray is WAY OTT in a domestic situation, and still does not negate banding. Indeed, and to be honest tray is way OTT in many commercial applications to be honest, the number of times we see tray spec'ed and indeed installed for a single piece of SWA to be fixed to it. You cannot even claim it is for expansion as most of the times the situation has no clear scope for future expansion. I was involved in VEing a project back in my early days for a major project, saved them 1.2million by sizing the cable tray correctly. 1 Link to comment Share on other sites More sharing options...
Carrerahill Posted October 21, 2019 Share Posted October 21, 2019 Just now, pocster said: Ah ! Even if just cat 5 cables ? It is to stop entanglement of those escaping or fighting fire. Cat 5 could sure hold you back if it was caught around your oxygen cylinder! Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 21, 2019 Share Posted October 21, 2019 38 minutes ago, pocster said: Ah ! Even if just cat 5 cables ? Any chuffing cables. C’mon batman. THINK DAMNIT! ( please ) lol ? 1 Link to comment Share on other sites More sharing options...
Ed Davies Posted October 21, 2019 Share Posted October 21, 2019 46 minutes ago, Carrerahill said: Cat 5 could sure hold you back if it was caught around your oxygen cylinder! If you're carrying an oxygen cylinder while fighting a fire a bit of cat 5 is probably the least of your worries. 1 Link to comment Share on other sites More sharing options...
Carrerahill Posted October 21, 2019 Share Posted October 21, 2019 12 minutes ago, Ed Davies said: If you're carrying an oxygen cylinder while fighting a fire a bit of cat 5 is probably the least of your worries. Air then! Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 21, 2019 Share Posted October 21, 2019 13 minutes ago, Ed Davies said: If you're carrying an oxygen cylinder while fighting a fire a bit of cat 5 is probably the least of your worries. Not when it’s wrapped around your regulator and you can’t reach it. And you’re in a burning building. That’s why the fire brigade brought about this legislation Link to comment Share on other sites More sharing options...
Pocster Posted October 21, 2019 Author Share Posted October 21, 2019 Ok ; so what would an electrician recommend for running mains cable in the loft space of a timber frame ? Link to comment Share on other sites More sharing options...
Jeremy Harris Posted October 21, 2019 Share Posted October 21, 2019 41 minutes ago, pocster said: Ok ; so what would an electrician recommend for running mains cable in the loft space of a timber frame ? Just clipped direct, maybe add a batten or board for the wiring runs if need be. Easy to do, keeps cables up off insulation, makes inspection easy, etc. Need to use 18th Ed compliant clips now, but that's no big hassle. TBH, despite the fact that they are more expensive, I prefer the metal clips. I recently tidied up some wiring using the Schneider metal clips and they seemed more robust. 1 Link to comment Share on other sites More sharing options...
Pocster Posted October 21, 2019 Author Share Posted October 21, 2019 22 hours ago, Nickfromwales said: Because you didn’t say please.... it’s a tool station link ✌️ Bingo Back to this as it seems simplest. So I just lie my cat5 cables across rafters or whatever then strap some bands at discreet distances apart ; screwed to the timbers; yeah? Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 21, 2019 Share Posted October 21, 2019 1 hour ago, pocster said: Back to this as it seems simplest. So I just lie my cat5 cables across rafters or whatever then strap some bands at discreet distances apart ; screwed to the timbers; yeah? Not quite. There’s a bit more ‘science’ to it than that. Link to comment Share on other sites More sharing options...
Pocster Posted October 22, 2019 Author Share Posted October 22, 2019 12 hours ago, Nickfromwales said: Not quite. There’s a bit more ‘science’ to it than that. Oh spill the illicit knowledge wise one , please ? Link to comment Share on other sites More sharing options...
Barney12 Posted October 22, 2019 Share Posted October 22, 2019 18 hours ago, pocster said: Thank you ! Hmm - I suppose it could work . But I’m going to add cable as I go - don’t really want them sagging . Could just use slim lengths of osb as trays with timber either side to stop cables falling out . If that’s satisfactory m’lord ?! just use some big chunky cable ties as your temp fixing. Once you’ve run all your cables use the band as a final fix. Simples. 1 Link to comment Share on other sites More sharing options...
Triassic Posted October 22, 2019 Share Posted October 22, 2019 How about using recycled guttering to hold the cables? Link to comment Share on other sites More sharing options...
Jeremy Harris Posted October 22, 2019 Share Posted October 22, 2019 24 minutes ago, Triassic said: How about using recycled guttering to hold the cables? As long as it's fire resistant. Since the 18th, cables need to be secured so they cannot droop down in the event of a fire, as a consequence of the cable supports melting. Link to comment Share on other sites More sharing options...
Pocster Posted October 22, 2019 Author Share Posted October 22, 2019 1 hour ago, JSHarris said: As long as it's fire resistant. Since the 18th, cables need to be secured so they cannot droop down in the event of a fire, as a consequence of the cable supports melting. Yeah so I am correct . I just use the metal straps to fix cables to the timber ? @Nickfromwales says there’s more to it than that though . Link to comment Share on other sites More sharing options...
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