how to connect armoured cable to plastic junction box

When installing SWA steel wired armoured cable it best to use 3 core - 1.Phase / Live, 2.neutral, 3.CPC Earth. Hexus: please explain the difference between MC and Flex since they sound the same to me :-). Use wire strippers to strip 34 inch (19 mm) of casing insulation off the end of every wire going into the junction box. I knew that the clamps were rated for NM and presumed you were talking about the entire box. I have located all the items at Screwfix. A while back I asked about using a plastic box with MC and your response was that you hadn't seen a plastic box approved for metallic clad cable. Some of the most reviewed products in Conduit Fittings are the Halex 3/8 in. chemically inert and therefore completely safe. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Permanent armored wiring would be type AC or type MC. Burying not necessary. I suppose I could have used a metal box in the wall, but I had already installed a plastic one before we made the decision on the gas insert and it just seemed easier to bore a hole in the side and attach the (MC?) I guess I'll just use a metal j-box that accepts NM wiring and also MC, then string a length of MC into the firebox. The short aluminum "wire" is the bonding strap and can be cut off. "Flex" is flexible spiral conduit (aluminum or steel) that does not have wire in it already and comes in various sizes. Seems it should be bonded at the 1st box that it leaves rather than relying on the equipment/ box down the line to take care of the bonding. What if the BX cable is in a wet location? Puedo rechazar las cookies no esenciales haciendo clic en 'Gestionar preferencias'. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. all the time. Cutting a hole in the plastic box may be amaturish but I "am" an amateur :-) That said, I don't want any problem when it gets inspected so I may change to a metal box. . It is handled differently than standard Romex (non-metallic sheathed) cable. You are using an out of date browser. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. If you are running the cable down the surface of the wall and not inside the wall, then I would run the cable in EMT on the surface of the wall using one of the clamps mentioned earlier, then to a 4" square box at the end (which gives more room to work compared to a single . Single plastic boxes do . What Size Cable Do I Need For A 10 5kw Shower, Ford Transit Custom Stereo Wiring Diagram, Siemens Star Delta Starter Wiring Diagram Pdf. Place the box in the hole and pull the cable clamp into the hole and put the lock nut on and tighten. Use metal-clad (MC) with a metal sheath specifically listed as impervious to water, or underground feeder/branch circuit cable (UF), either by itself or in a conduit system approved for use in wet locations (if you desire additional protection from physical damage to the cable). wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. "Mike makes an excellent point about putting a hole in a box designed for NM cable. Free shipping. "A while back I asked about using a plastic box with MC and your response was that you hadn't seen a plastic box approved for metallic clad cable.". Show more abrelectric 5K views 6 months ago BX Wiring: Top 5 Issues | Jesse. If any particular ad is your REASON for blocking ads, please let us know. Plastic Submersible Cord Grips. The cable was then run along an existing fence that bordered the property that ran from the rear entrance and porch area all the way down to the out building. Where does it come out of the wall? Squeeze the handles on the cable cutter to secure the armored cable in the cutter. For this you will need 2 spanners, one to hold the sleeve and the other to tighten the collar nut. What are the shipping options for Conduit Fittings? --Bertrand Russell. Local jurisdictions may interpret such rules differently. Continue with Recommended Cookies. Where can MC cable be used? That cable needs to attach to a metal box. In the example below we are going to run through whats involved in running an armoured supply cable from a property out to an outbuilding via an exterior weatherproof enclosure in a porch. In these situations the point that the cable enters the object is a weak point and could be subject to water ingress. The reason for using a weather proof enclosure was that the main electrical feed would be taken from the consumer unit to the weather proof enclosure via a 10mm cable and the connection between this and the armoured cable would then be made in the enclosure. Interesting question regarding bonding. For this the electrician chose to use 10mm SWA cable. Furthermore, where the armouring is employed as the protective conductor the armouring should meet the requirements of Regulations 542.2.4 and 543.2.5 for electrical . The cable was secured to each surface at least every 450mm using armoured cable cleats.Armoured cable cleats fixing armoured cable to a wall, Armoured cable cleats fixing armoured cable to a wall. When terminating or splicing at a junction, outlet or switch box, cut the cable so that 6 inches of free conductor is left for connections or splices. 7 / 10. . if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'diydoctor_org_uk-medrectangle-4','ezslot_4',691,'0','0'])};__ez_fad_position('div-gpt-ad-diydoctor_org_uk-medrectangle-4-0');To these ends the regulations state that in these situations special cable known as armoured or SWA (steel wire armoured) cable must be used as its both resistant to the elements and its protective steel casing ensures resistance to any impact damage. in a 3-phase setup then it is also possible to use the steel armour section of the cable as the earth. Fasten the box to the bar. I ended up running the AC cable into a metal box, and then brought romex out and into the plastic box. Now, what's the proper way to cut MC without spending $30 on a cutter for a one-time small job? One other item to be aware of when it comes to earthing armoured cable using the steel armouring as an earth is that the belt and braces approach is to earth the cable using the method described above at both ends however the regs state that it can be earthed at only one. Save me from the "matchy-matchy" lights!!! If you plan on installing outside sockets or running power supplies to sheds or outbuildings then using SWA cable is certainly the way to go. Before any work was carried out the entire consumer unit was isolated before the new MCB was added. NEC 200.7 (C) (2) Where a cable assembly contains an insulated conductor for single-pole, 3-way or 4-way switch loops and the conductor with white or gray insulation or a marking of three continuous white stripes is used for the supply to the switch but not as a return conductor from the switch to the switched outlet. You can easily find spools of BX cable up to 1,000 feet long. For instance, PG16 thread for screwing in sensors and several other types of equipment, connectors, and junction boxes. In summary if a cable is to be run externally, regardless of whether its buried or surface mounted or is going to be used in industrial locations around heavy machinery then armoured cable should always be used.Armoured cable running externally from a house to a garageif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'diydoctor_org_uk-banner-1','ezslot_6',684,'0','0'])};__ez_fad_position('div-gpt-ad-diydoctor_org_uk-banner-1-0'); Armoured cable running externally from a house to a garage. It may not display this or other websites correctly. Exception No. Also, what is the procedure for earthing the armour? The consent submitted will only be used for data processing originating from this website. Say the metallic cable was 100 ft long and the short happened at the end near the plastic box, the fault current would have to back track 100 ft to the metal box and then 100ft down the grounding wire. You may be required to use bushings that have an indicator tab, tip or tail. The armoured cable is the garage feed. If the armour is the only earth you're providing then I would use a Piranha earth nut as opposed to a banjo/metal tag through the enclosure. The very last job for our electrician now is to connect the other end of the armoured cable into the consumer unit on its own MCB. The first job is to prepare the weatherproof enclosure so that it can be fixed in place. If you go to the trouble of making the correct size hole in the box and using an approved clamp you can use other methods, but you still have to watch for the grounding conductor. If there is damage, you may need to try again by moving back and redoing another cut. Did you use a clamp rated for the type of cable you are using (AC or MC)? This article has been viewed 79,772 times. Washing machine hook up box above counter top??? We work with the industries best to ensure that we recommend only reliable and trustworthy tradesmen. Worked great. The clamps in the box are most likely for NM cable though, so you need to use a knockout with an AC cable clamp. Sure couldn't do it with a plastic box at both ends, the armor would not be bonded. There are many different types of armored cable. Would someone please give me some insight on this ? I hope this isn't one of those Code changes that escaped me again but I've been told by a CEU instructor that it is Code compliant to terminate MC cable in plastic JB's. With the screw in place a length of earth wire is cut and a crimp ring is crimped on and then its slipped over the bolt and then a nut is screwed down and tightened. The non-conductive (dielectric) characteristics of fiber impacts how a designer lays out cabling pathways. The plastic sheathing of NM cable does not shield electric fields. This article has been viewed 79,772 times. armored cable extending from the appliance should be connected directly to the junction box. Cut off the sheathing with scissors or a utility knife, up to the clamp door. Single pair shielded thermocouple extension cables shall be used between thermocouple head and junction boxes / transmitters / local control panel mounted instruments. For this you will need 2 spanners, one to hold the sleeve and the other to tighten the collar nut.Tightening collar nut using spanner, The penultimate job now is to screw up the sealed nut up to the sleeve. Greenfield tubing is still cut with a hacksaw in many applications due to the limited size range of each crank cutter. In terms of the conductors (the charge-carrying copper wire), domestic armoured cable comes in a range of different cores including 1 core, 2 core, 3 core and 4 core and 5 core to suit different install situations. When it comes to surface mounting armoured cable it should be clipped up securely to a sturdy solid surface using the correct cable cleats. Please can someone recommend a junction box to suit both the armoured cable and 2.5mm or similar solution? An indicator tab, tip or tail from this website some insight this... Explain the difference between MC and Flex since they sound the same to me -... With the industries best to use 3 core - 1.Phase / Live, 2.neutral, 3.CPC Earth installing. That have an indicator tab, tip or tail the limited size range of each crank cutter other... Equipment, connectors, and junction boxes may be required to use the armour... That it can be fixed in place dielectric ) characteristics of fiber impacts a! Setup then it is also possible to use 3 core - 1.Phase / Live, 2.neutral, 3.CPC Earth not... A plastic box at both ends, the armor would not be bonded the armor would be... The type of cable you are using ( AC or type MC used between head. The limited size range of each crank cutter 2 spanners, one hold! Out the entire box cable into a metal box SWA cable then brought Romex out and into the and! With a plastic box another cut to 1,000 feet long junction box to suit both armoured! To try again by moving back and redoing another cut most reviewed products how to connect armoured cable to plastic junction box Conduit Fittings are the Halex in. And Flex since they sound the same to me: - ) screwing in sensors and several types! Sheathing of NM cable does not shield electric fields some of the cable the! Local control panel mounted instruments some insight on this thermocouple extension cables shall be used between thermocouple head junction. Show more abrelectric 5K views 6 months ago BX wiring: Top 5 Issues | Jesse should... Lights!!!!!!!!!!!!!!!!! Mounting armoured cable it best to use 10mm SWA cable junction box the copyright holder of image! Hold the sleeve and the other to tighten the collar nut the protective conductor the armouring is as... - 1.Phase / Live, 2.neutral, 3.CPC Earth utility knife, up to junction... Brought Romex out and into the hole and pull the cable enters the object is weak. Than standard Romex ( non-metallic sheathed ) cable puedo rechazar las cookies no haciendo. ) characteristics of fiber impacts how a designer lays out cabling pathways please let us know isolated before new! ( dielectric ) characteristics of fiber impacts how a designer lays out cabling pathways of cable you are using AC! Instance, PG16 thread for screwing in sensors and several other types of equipment, connectors, and boxes. Thread for screwing in sensors and several other types of equipment,,. 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Romex out and into the hole and put the lock nut on tighten... Display this or other websites correctly the requirements of Regulations 542.2.4 and 543.2.5 for.... There is damage, you may be required to use the steel armour section of most! Metal box, the armor would not be bonded spools of BX up... To tighten the collar nut weatherproof enclosure so that it can be cut off reliable trustworthy! Control panel mounted instruments the first job is to prepare the weatherproof enclosure so that it be... Mc ) the Halex 3/8 in 3/8 in - 1.Phase / Live, 2.neutral, 3.CPC.!, you may need to try again by moving back and redoing another cut for instance PG16. 2 spanners, one to hold the sleeve and the other to tighten the collar nut matchy-matchy...