Electrical and Installation Guides Page 5: 257 technical guides for choosing Electrical and Installation products: selection criteria, standards, common mistakes and frequently asked questions.
What Is a Fan Guard? Sizes and Selection Criteria — A fan guard is a metal wire grille screwed to the intake or outlet face of an axial fan to keep hands, cables and foreign objects away from the rotating impeller. What Is a Nickel-Plated Brass Blind Plug? Types and Selection Criteria — A nickel-plated brass blind plug is a nickel-plated brass plug that closes an unused metric or PG threaded cable entry hole in metal enclosures, boxes and machine housings. What Is a Doorbell? Types and Selection Criteria — A doorbell is a wired or wireless signalling device that sounds an alert indoors when the button at the entrance is pressed, announcing that a visitor has arrived. What Is a Narrow Entry Cable Lug? Cross-Section, Bolt Size and Selection — A narrow entry cable lug is a copper cable lug, crimped onto the cable, whose flat tab with the bolt hole stays narrow even at large cross-sections. What Is an Outdoor Construction Site Panel? Types and Selection Criteria — An outdoor construction site panel is a weatherproof portable distribution board that feeds grid or generator power to plug-in equipment through CEE standard sockets. What Is a Polyamide Blind Plug? Types and Selection Criteria — A polyamide blind plug is a plug with a polyamide body that closes an unused PG or metric-thread cable entry hole in panels, junction boxes and device housings. What Is a Spring Connection Terminal Block? Multi-Level Types — A spring connection terminal block is a DIN rail terminal block that holds the conductor by spring force instead of a screw; it needs no tightening torque and does not loosen under vibration. What Is a Multi-Contact Plug? Housing Types and Selection Criteria — A multi-contact plug is a rectangular industrial connector with a male contact insert that plugs into a multi-contact socket of the same layout and locks with a latch. Junction and Combination Box Accessories: Types and Selection Criteria — Junction and combination box accessories are add-on parts that add breaker slots, replace lids and hinges, add cable entries, or let the box be hung and carried. What Are Metal Trunking Splice and End Fittings? Types and Selection Criteria — Metal trunking splice and end fittings are the splice plates, end caps, reducer plates and separators that join sheet metal cable trunking and close its ends. What Are Switch and Socket Covers? Types and Selection Criteria — A switch and socket cover is the front part fitted in front of the mechanism in modular switch and socket ranges, carrying the rocker, socket opening or jack opening. What Is a CEE Angled Wall Plug? Types and Selection Criteria — A CEE angled wall plug is a male inlet, surface-mounted on a wall or machine body, whose pins face down in an angled housing and which takes power from a CEE extension socket. What Is an Opaque-Door Plastic Enclosure? Types and Selection Criteria — An opaque-door plastic enclosure is an ABS, polycarbonate or polyester housing with a lightproof door that protects electrical equipment against dust, water and contact. What Is a Splice Joint? Types and Selection Criteria — A splice joint is an insulated or non-insulated tubular connector that joins two cable conductors end to end when they are inserted and crimped. What Are Metal Trunking Bends and Connectors? Types and Selection Criteria — Metal trunking bends and connectors are formed sheet steel parts that change the direction of a sheet metal cable trunking run or split it with tee and four-way junctions. What Is a Terminal Block Top Jumper? Types and Selection Criteria — A terminal block top jumper is a comb-shaped connecting part that fits the bridge slot of DIN rail terminal blocks to join adjacent blocks at the same potential. What Is a Single-Phase Rubber Socket? Types and Selection Criteria — A single-phase rubber socket is a 16 A socket with an impact-resistant flexible rubber body, fitted to an extension cable end or a wall to provide power on sites and in workshops. What Is an Angled Cable Lug? Types and Selection Criteria — An angled cable lug is a copper crimp lug whose tab is set at 45° or 90° to the barrel; it connects the cable to the bolt in tight spaces without bending it. What Is a High-Current Industrial Plug and Socket? Types and Selection Criteria — A high-current industrial plug and socket is a detachable heavy-duty connector that carries currents above 125 A in one housing for generators, mobile boards and site distribution. What Is an Aluminum Junction Box? Types and Selection Criteria — An aluminum junction box is a connection box with a cast aluminum body and a gasketed lid that protects cable joints against impact, dust and water. What Is a Panel-Mount and Machine Type Socket? Types and Selection Criteria — A panel-mount and machine type socket is an earthed socket-outlet fitted in a cut-out in a panel door, side wall or machine housing, wired from the rear. What Is a Transparent-Cover Junction Box? Types and Selection — A transparent-cover junction box is a plastic connection box with a clear lid that lets you see the connections and devices inside without opening it. What Is a CEE Straight Wall Socket? Types and Selection Criteria — A CEE straight wall socket is a fixed IEC 60309 industrial socket screwed onto a wall or column, with its outlet facing straight out; it supplies machines and portable equipment. What Is Sheet Metal Cable Trunking? Types and Selection Criteria — Sheet metal cable trunking is a U-section channel bent from galvanised steel sheet that carries cables along ceilings, walls or floors on hangers and brackets.