Wani Junction Box (Jikin Kuli)
Junction box – kuma ake kira ‘electrical box’, ‘jbox’, ko kuma ‘terminal box’ – shine wata na tushen da suka dace da cikin wire suka haɗa. Junction boxes suna samu ne a cikin plaster da kaɗuwar gwamna, a cikin sakar, ko kuma a cikin cement. Suna da muhimmanci a cikin manyan gida, gwamna, da kuma ƙungiyoyi.
Junction boxes suna samu waɗanda a cikin gida da a cikin gaba. Junction boxes masu mutanen ruwa suna amfani da su a cikin gaba.
Junction boxes suna zama da metal ko plastic. Aku na junction box masu ƙwarewa:
Junction box na metal
Junction box na PVC (plastic)
Junction box na ABS (plastic)
Junction box na fiberglass (fiber-reinforced plastic)
A cikin haka da ake samun electricity, za a iya samun junction box.
Me Yaɗa Junction Box Yana Bincika?
Junction box yana da muhimmanci a kan abubuwa da dama:
Yana da ƙarin alheri masu mafi shiga wire
Yana da ƙarin alheri wire da dust da ruwa mai sauke
Yana da ƙarin alheri wire da duk da ƙwakilai (rats) suka ƙwakar wire
Yana da ƙarin alheri electrical floor plan a kan units
Yana da ƙarin alheri fire da take faru a cikin junction box ya barra (a lokacin da ake magance)
In short: junction boxes suna da ƙarin alheri wire daɗinsu, kamarfeeder pillar.
Sun fada abubuwa da ba ake so in haɗa wire, kamar ruwa, rats, da ƙaramin ƙaramin.
A lokacin da ake magance, sun fada fire da take faru a cikin junction box ya barra.
Sun fada ƙarin alheri electrical wiring a cikin gwamna. Har zuwa junction box a cikin gwamna yana nuna section baya a cikin floor plan. Junction boxes masu ƙwarewa suna da whole house surge protectors.
Wannan ƙarin alheri yana yi aiki a kan electrical work daɗinsa (kamar electricians tools). Electrician’s life ya fi yawa da kullum idan ba a bi junction boxes.
Zabi Junction Box Na Daidai
Daga abubuwan electrical junction boxes da ke samu a market, zabi na daidai ya fi yawa. Idan kana zama da metal ko plastic, yanayin da ta shafi shine ma ƙunshi rike.
Do you need a waterproof junction box? Is it an outdoor or indoor junction box? Is it a 4 or 8 terminal junction box? The list of questions goes on.
So let’s boil the selection down. These are the four main factors you need to consider when choosing a electrical junction box:
The protection rating of the junction box
How the wires are connected within the junction box (the type and number of terminals)
The material the junction box is made from
The size and shape of the junction box
Junction Box Protection Rating
Protection rating na junction box, da National Electrical Manufacturers Association (NEMA) ce, yana da muhimmanci don tsara standards na safety da durability a North America.
NEMA ratings sun bayyana environmental conditions da junction box zan iya daidaita, kamar dust, light, wind, snow, da wasu weather conditions.
For a weatherproof electrical junction box, you want at least NEMA Type 3 (Type 3X/3RX/3SX if you also need protection against corrosion).
A NEMA rating not only clarifies if a junction box is fit for hazardous environments or outdoor use but also its resistance level against substances like oil and coolants, ensuring long-lasting protection.
Another popular rating system is the Ingress Protection (IP) or International Protection rating system. This is commonly known as an ‘IP rating’.
The IP rating describes the degree to which a junction box provides protection against the ingress of foreign objects, dust, and moisture.
‘Ingress of foreign objects’ is just a fancy way of saying ‘what can and can’t enter into’ the junction box.
There are varying levels of protection – for example, dust or water resistant junction boxes, dust tight junction boxes, watertight junction boxes, and submersible junction boxes. The exact level of protection will depend on the IP rating.
Common IP rated junction boxes include:
IP65 junction boxes – IP rated as “dust tight” and protected against water projected from a nozzle.
IP67 junction boxes – IP rated as “dust tight” and protected powerful jets of water or against heavy seas (up to 1m depth of submersion)
IP68 junction boxes – IP rated as “dust tight” and protected against complete, continuous submersion in water (suitable for continuous submersion at depths below 1m. Manufacturer will usually give details of maximum depth and/or pressure conditions)
Lastly, you have the electrical protection of a junction box. This protection rating is generally given in amps. This rating is used to determine if a junction box can handle the maximum fault current of your intended circuit.
It’s always a good idea to overrate your electrical junction boxes rather than underrate them. This overrating acts as a safety buffer – preventing human error in rating calculations or unexpected fault conditions from causing harm.
Junction Box Terminals
A terminal is a point within the junction box where two wires are connected together. You often have multiple terminals within the same junction box, with each terminal serving as a connection point for two different wires.
Make sure to use a good insulation resistance tester if you need to measure the insulation resistance. If you need to remove the insulation from the tips of the wires, you can use a set of wire strippers to strip the insulation off before connecting the wire to the terminal.
You can think of each terminal within a junction box as a dock within a shipping port. Just as each dock at the port is intended for a different line of shipment, each terminal within a junction box is intended for a different electrical connection.
Just as a shipping port can have multiple docks, so can a junction box. The most common junction boxes are 4 or 6 terminal junction boxes. That said, the exact number of terminals will always depend on how many connections you need to make. When choosing an electrical junction box make sure that you have enough terminals for each pair of wires you wish to connect.
Wiring is run through each terminal to create an electrical junction. You can measure the voltage across the junction using a multimeter. There are a few different ways to connect wires at a terminal. The type of terminal depends on how exactly the wires are connected:
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