Years ago I used to install commercial catering equipment and wired them up with SY cable. Those days I haven't seen any special gland for the SY ( or my wholesaler never heard of it) so I improvised external SWA glands by slitting the main section with metal hacksaw and terminate the SW as you did. Great job by the way.
Another great vid guys. I’m glad your showing the younger ones how to do it correctly. Hopefully we will see correctly glanded sy on AC units in the future. Personally I bloody hate the stuff and it should be sent to hell. Nearly all my commercial inspection I do, SY has been installed terrible and the condition of the cable if stupidly used out side or in damp conditions is appalling.
It shouldn’t be used that’s why ITS NOT FOR CARRYING VOLTAGE IN U.K. JUST CONTROL GEAR … as for using the braided for earth lol it’s not for that in any way IET & NICEIC BOTH SAY SY IS A C3 min but a C2 if showing any sign of thermal damage ( which it does if any voltage ever goes to the braiding)
A little trick for cutting the braiding back. If you make a little hole by peeling the braiding to each side you can hoop the cable through and cut off the braiding where needed. I've always linked my braiding to earth directly however and sleeved.
Don’t think I have ever seen SY flex, it looks like that American kopex that aluminium flexy conduit that’s pre wired . Were would SY flex be used ? Great video Gaz as always 👍👍👍❤️
SY and CY are a contentious one in the UK mate. There's an argument they shouldn't be used as they're designed to a German standard and not a British Standard. They tend to be used for control wiring and I've seen them used on pump sets, possibly because the manufacturer of the pumps sets are outside of the UK.
Can't help thinking gland manufacturers could do something to help keep the armouring between the washers. Some kind of rim, maybe? That looks like a real faff.
The cable gland could be designed better by having a cup shaped washer and a flat washer to keep the strands in place . The same as a CPC connection on an immersion heater .
@@GSHElectrical WHY ARE YOU USING / promoting SY ?? AS OTHERS HAVE SAID SY DOES NOT CARRY AS BS no. AFTER CONSULTING NICEIC & IET THEY HAVE BOTH SAID SY IS A C2 if showing any signs of thermal damage. As the braiding is not designed to carry any voltage it should not be used as an earth .. SY IS FOR CONTROL CABLE.. SURELY YOU SHOULD BE TELLING STUDENTS NOT TO USE IT .. there is cable manufacturers looking at making SY & getting it a BS but untill then you are installing a C ISSUE IF USED . PI** POOR PRACTICE!!!!!
WARNING. That gland is fine made off like that when it’s inside but not when used externally installed in that fashion, and I’ve seen hundreds no thousands of them especially on air con units, the braid acts like a wick and draws moister down the braid is then heated by the sun causing mould growth and corrosion destroys the earth continuity to the braid and eventually fills the lower end switch or joint box with water If you look at the gland the split stops short of the base you need to make off with the two rings or washers on the inside thus preventing moister to enter between the external pvc and cable sheath,
Oh yes forgot to mention it’s also not suitable to be used outside in the first place but unfortunately it dose get used, so at least stop the water getting in or use a suitable cable even better.
I was wondering is SY acceptable for fixed installation on trays for example. I used to use SY on machines but always thought it performed very poorly especially in any applications with even small amounts of flexing. The outer sheath can be damaged by the inner braiding and they deteriorate quickly if installed outside. You will always get moisture ingress between the two sheaf clamp washer and water then collect inside the cable braid. In places like New Zealand they use something very similar to SY for all the industrial installations.
SY does not comply with our BS standard for cables, not sure why it is being promoted here? It is a cable made to a EU standard there are no tables for volt drop or current carrying capacity so it cannot be sized for our UK 18th edition.
@@pirate69s All manufactures produce the data sheets including volt drop and current capability. The BS 7671 is just a guide, you should always use the manufactures data sheets. And 6mm is 6mm is 6mm, volt drops will always be the same. They will have different current ratings, and that is dependent on the level of insulation and at what temperature it can stand.
LAPP SKINTOP MS SC M are far more advanced glands for SY cable and are suitable for areas where spraying or splashing water is likely. They are my preference.
I've seen many professional sparks make the same armoured shroud mistake. If you want your shrouds to have a wobbly cut then do it like this guy. If you want a more concentric and neater cut then push the uncut shroud over the cable in the wrong direction, then cut in a circular motion using the cable as a former, then fit the shroud in the correct direction. Laying it flat for the cut looks toilet.
I have just removed alot of this shite cable in a garden which the previous "spark" used to wire lights and sockets! He used the braid as an earth cause he found he did not have enough conductors to do what he wanted to, he terminated the braid in choc blocks in the back of the lights! The cable was undersized also giving massive earth fault loop readings. Needless to say the whole shite got ripped out and replaced with swa.
@@GSHElectrical I appreciate the video, and it's a very good demonstration. The issue I have not with you but in general is the selection of equipment in general for the environment, I have seen this stuff in loads of gardens etc where it is not appropriate, yes it has its uses in industry, but it is not recognised by bs7671 as a previous comment stated. In my opinion its awful stuff and there are better alternatives in certain situations
It’s nice to see a CXT gland on some SY for a change. However, the only places I see it used are the exact same places it isn’t designed to be used. There are better alternatives with BS ratings.
Ok.decent tip. I just had to check a gas flare. Sy cable outside run on ground no cable tray. Looked up the ruling. Tbh I have used it on e or twice and didn't mind it...but rules are rules. Ta
@@GSHElectrical why are you not contacting the assessment body and telling them it shouldn’t be used except for control gear !!!!! How many other things are you teaching that is wrong .. but doing it because the computer says NO 🤔🤔😂😂
@@makg4655 SY can be used as supply cable (Low tension feed) I have asked all the manufactures and have their responses on file, its my insurance against owt going t1ts up. To be honest, after years of installing this stuff, Its fine. Carried out inspections on my designs in Nuclear plants and its still ok, after more than 20 odd years in service.
Hey, great video as always. We have to make off SY for our college exam, but have been told that we need to take braiding inside box and then crimp. My college is saying this is what is expected in the AM2. Has anyone done the AM2 recently and know which is the required way for it to be fixed?
@@obd6HsN the braid is an extraneous conductive part, and therefore must be earthed. It can be used as an earth conductor, but I always use cables with an internal earth as well. If its a high frequency job, make sure the braid is only connected to earth at one point, use the inner earth for earthing the motor etc. The use of both inner and braid on high frequencies (both connected at either end and above 20kHz or so) can lead to induced circulating earth currents.
@@007floppyboy that's exactly what I said: "the fly lead [provides] an earth to the braid". Are you saying that the braid is suitable for use as the CPC?
@@obd6HsN Yes, the braid can be used as CPC, its the same as SWA, but you need to do the calcs as per SWA. Again I personally dont rely on them, but that doesn't mean you cannot. I think of it as a 'gain' when using them, lowing the return resistance to its ALARP, As Low As Reasonably Practicable.
@@GSHElectrical is it correct that we can't use it in the UK because it's not got a BS standard, seeing as it's a European cable is there a harmonised standard ?
@@dennisphoenix1 & the braiding is not designed to carry voltage .. this video is so wrong . As it’s for U.K. STUDENTS.. he should be telling them it is not to be used in new installations or they are installing a fault.. PI** POOR PRACTICE
Got to then ask the question, why are products for SY cable still being manufactured for the UK market, if it is not allowed? I don't know but that's a reasonable question. SY not allowed on Ex installs but allowed in factories and commercial I think.
Those glands are crap, just use a standard SWA gland and flip the tapered olive upside down so it bites into the braiding and make it off live an SWA, saves time and both....these glands are crap!
I know this is the by the book way of doing it, but i really can't see a reason why you cant just use a stuffing gland and take the yarn strait to the cpc terminal inside the enclosure? This has always seemed pointless imo. I haven't used sy in the 10 years since doing my AM2 and I'm a commercial spark (Before I get the housebasher comment). The most pointless cable ever invented also.
I complained to NET about this, they said they included it because it was listed as an acceptable cable by City & Guilds despite the IET saying its use should be discouraged. Personally I think there are plenty of other types of cable that it would be more useful for apprentices to learn how to terminate especially those who will go into industrial work.
Those glands are simply the worst type of gland I have ever had the misfortune to use. I used them in the 80s, complete joke, and you expect them to improve, no they didnt. If you are thinking of using these stop, chuck em in the bin. Loads of other good glands out there, just like SWA E1W glands or similar, where they grab the flex all around with the olive. Also, if your doing any high frequency work, these glands dont meet latest EMC standards where as an E1W type does.
I've done electrics for a long time, and I did an apprenticeship many years ago. I was never taught SY and I've never used it. I can't help thinking for the exact same amount of work you might as well use SWA? It's tougher, better and you can use it outside and bury it etc. If you don't need that level of mechanical protection, then you might as well use NYY-J and stuffing glands and save yourself a little bit of faff. Also, I haven't used a banjo in years, those pirahna/earthing nuts are so much less hassle and save you compromising the IP rating of your enclosure.
Hi, would it be acceptable to fix the earth rings down with a locknut before putting the gland into the consumer unit to make it easier ? Then another locknut inside the consumer unit to hold the gland in place?
Pretty sure you can use it... Have to Put it down as a departure from bs7671 on certificate and fill in box for other type of cable on circuit schedule..
Any departure from BS7671 must meet or exceed the UK standards, how can you show it does when you have no current carrying capacity of the braid under fault conditions. Even the manufacturers say it is only for controls not fixed wiring for power supplies.
@@GSHElectrical well you had 2 pairs of side cutters.. I think one pair could be dropped and replaced for the scissors.. they are really handy for stranded copper, like in this video :-)