Product selection guides
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Product selection guides: all in one place
73 guides written from an engineer's point of view: situations, selection matrices, diagrams, common mistakes and answers to practical questions. Each guide is on its own category page – from there you are one click away from the products.
Audience: For home · For electricians · Industry, projects · NEW – recently published guides
Groups: Electrical distribution: general guides (3) · Cables, wires and busbars (6) · Enclosures, boxes and accessories (4) · Modular equipment for panels (15) · Lightning and surge protection (3) · Installation: switches, sockets, frames (4) · Overhead lines and energy infrastructure (3) · Solar plants and backup power (1) · Smart home and control (8) · Lighting (4) · HVAC: ventilation, heating, sensors and automation (10) · Video surveillance (2) · Work safety and emergency solutions (4) · Facility maintenance: hatches and covers (5) · Other (1)Electrical distribution: general guides
Guide What it helps to solve For whom Reactive power compensation guide
Reactive power compensation equipmentHow many kvar you need and which capacitors and controllers suit the site Industry, projects Current transformer and Rogowski coil guide
Current transformers and Rogowski coilsRatio, accuracy class, VA burden and type: solid core, split core, 333 mV or Rogowski For electricians Industry, projects Power quality analyser guide
Smart power analysersDisplay, Wi-Fi monitoring, Modbus metering or power quality; measurement duration and rental For electricians Industry, projects Cables, wires and busbars
Guide What it helps to solve For whom BVV-LL cable guide
Copper power supply cables BVV-LLCable purpose, cores and cross-section for installation For electricians H03VV-F and H05VV-F wire guide
Copper power supply cables H03VV-F, H05VV-FFlexible cords for appliances and extension leads: 300/300 V and 300/500 V For home For electricians Cable selection guide
Power cables and wiresCable type, cross-section and laying conditions according to load and environment For electricians Industry, projects NYM-J (KH05VV-U) cable guide
Copper power supply cables KH05VV-U (NYM-J)2–5 cores, 1.5–10 mm²: indoor building installation For electricians Special-purpose cable guide
Special-purpose power supply cablesHow to choose a cable by temperature, movement and signal For electricians Industry, projects Busbar guide
Power distribution busbarsBusbar type, material and cross-section by current For electricians Industry, projects Enclosures, boxes and accessories
Guide What it helps to solve For whom Meter cabinet lock guide
Locks, keys, latchesA lock for an electricity meter cabinet or enclosure For electricians 1-0-2 load break and changeover switch guide
Load break switches, changeover switches 1-0-2Load break switch, 1-0-2 changeover or safety isolator: when to use which For electricians Industry, projects Combined socket panel guide
Industrial combined panels with socketsCombined panel with sockets: selection by loads For electricians Industry, projects Panel lock and key guide
Locks, keys, latchesHow to identify, choose and fit a lock or key For electricians Industry, projects Modular equipment for panels
Guide What it helps to solve For whom Circuit breaker guide
Circuit breakersCurve, current, poles and breaking capacity For electricians Fuse and fuse switch guide
Fuses, fuse switches, NH basesFuse size and current by cable, gG / aM, selectivity, fuse holders and NH bases up to 1250 A For electricians Industry, projects Phase monitoring relay guide
Phase monitoring and sequence relaysPhase sequence, asymmetry and motor protection For electricians Industry, projects Modular equipment guide
Modular equipment for panels: protection, RCBO, relays, contactorsWhat to install in the panel by situation, residual current protection 30 / 100 / 300 mA, RCD or RCBO, types AC / A / F / B, curves B / C / D For home For electricians Industry, projects VIP guide to RCDs and RCBOs
Residual current devices (RCD), RCBOFor homeowners, students and engineers: 10 / 30 / 100 / 300 mA, types AC / A / F / B, selectivity, „wrong and correct“ diagram, 5 solution levels For home For electricians Industry, projects Photo relay guide
Photo relays, twilight switchesHow to choose, where to mount the sensor and how to connect LED For home For electricians Voltage relay guide
Modular voltage relaysWhen a voltage relay protects and when it does not For home For electricians Staircase lighting relay guide
Modular staircase lighting relaysStaircase timer: time, push buttons and LED load For electricians Moulded case circuit breaker (MCCB) guide
Industrial circuit breakersHow to choose an industrial circuit breaker Industry, projects Liquid level control relay guide
Modular liquid level control relaysLevel relay for pumps and tanks For electricians Industry, projects Interface relay guide
Modular interface relaysSignal amplification and load control in the panel For electricians Industry, projects Contactor, relay and SSR guide
Contactors, relays, SSRContactor and thermal overload relay for motors up to 45 kW, AC-1 / AC-3, coil voltage, SSR cooling For electricians Industry, projects Push button guide NEW
Control push buttons 16 / 19 / 22 mm, START–STOP, emergency STOPHow to choose a push button: NO/NC and latching, colours per EN 60204-1, LED voltage 24/110/230 V, IP40 or IP65, emergency STOP per EN ISO 13850, START–STOP self-holding circuit For electricians Industry, projects Selector switch guide NEW
Selector switches with knob and key 22 mmHow to choose a selector switch: knob or key, 2 or 3 positions, maintained or spring return, LED 24/230 V, MANUAL–0–AUTO mode circuit For electricians Industry, projects Indicator lamp guide NEW
LED indicator lamps 22 mm and 10 mm, 12–400 VHow to choose an indicator lamp: voltage 12–400 V, colours per EN 60204-1, compact or modular, IP54 or IP65, phase indication circuit For electricians Industry, projects Lightning and surge protection
Guide What it helps to solve For whom T1+T2 surge arrester guide for the main panel
Surge protection devicesHow to choose a surge arrester for the main panel For electricians Industry, projects Lightning and surge protection guide
Surge and lightning protectionHow to protect a building and electrical equipment: protection stages and external lightning protection For electricians Industry, projects Lightning protection system assembly guide
Lightning protection and earthing componentsRods, connectors and earthing: how to assemble a working system For electricians Industry, projects Installation: switches, sockets, frames
Guide What it helps to solve For whom Switch, socket and box guide
Electrical installation componentsHow to choose switches, sockets and installation boxes For home For electricians Retro frames for flush installation guide
Frames for flush-mounted installation componentsRetro-style frames for flush-mounted switches and sockets For home Retro frames for surface installation guide
Frames for surface-mounted installation componentsRetro-style frames for surface-mounted switches and sockets For home Adapter guide NEW
Household and industrial adaptersFrom travel adapters to 400 V 32 A: „I have this socket → I will connect“ matrix, what not to do For home For electricians Industry, projects Overhead lines and energy infrastructure
Guide What it helps to solve For whom Reinforced concrete pole guide
Reinforced concrete poles for overhead lines and infrastructure networksPole type and height for overhead lines Industry, projects Eye nut guide
Eye nuts for overhead lines and energy infrastructure fixing pointsEye nuts for overhead line and energy assemblies Industry, projects Preformed spiral anchor clamp guide
Preformed spiral anchor clamps for overhead linesClamp by conductor type and cross-section for overhead lines Industry, projects Solar plants and backup power
Guide What it helps to solve For whom ATS backup power changeover switch guide NEW
Backup power changeover switches for generators (ATS / MTS)Changeover switch for a generator: ATS or MTS, current and poles For electricians Industry, projects Smart home and control
Guide What it helps to solve For whom Smart door lock guide NEW
Smart door locksHow to choose a lock for outdoor and indoor, wooden, metal and glass doors: 30 s selector and 5 solution levels For home For electricians Exit button guide NEW
Exit door release buttons (REX)How to choose an exit button for a magnetic lock: NO/NC/COM contacts, wiring with and without a controller, indoor and outdoor IP65 models, emergency door requirements For home For electricians Face recognition terminal guide
Face scanning and recognition systemsHow to choose a face terminal: door control, time attendance or temperature check, EM / MIFARE / DESFire cards, fingerprints, IP65 and GDPR notes For home For electricians Smart home guide
Smart automated productsWi-Fi, ZigBee or RF, hub, switches and sensors – how to build one system For home For electricians SONOFF smart home guide
SONOFF smart controlHow to choose SONOFF relays, switches, hub and sensors For home For electricians SOS emergency call system guide
Smart SOS emergency call systemsEmergency calls for seniors and people with disabilities at home, in care homes and outdoors For home Industry, projects Mirror switch guide
Touch and touchless switches behind the mirrorTouch and touchless switches behind the mirror: selection and connection For home For electricians Mirror heater guide
Mirror heating padsHow to choose the size, where to stick it and how to connect it For home For electricians Lighting
Guide What it helps to solve For whom Lighting guide
Lighting solutionsHow to choose a luminaire, wattage, colour temperature and IP rating For home For electricians Industry, projects LED lamp guide
Energy-saving LED bulbsBase, lumens, colour and compatibility when replacing old bulbs For home LED T5 linear luminaire guide
LED T5 linear luminairesLength, series, colour and mounting for furniture and under cabinets For home For electricians Blue light luminaire guide
Blue luminairesWhere blue light works, what it does not replace and how to install it Industry, projects HVAC: ventilation, heating, sensors and automation
Guide What it helps to solve For whom CO₂ sensor guide NEW
Air quality meters, CO₂ and VOC sensorsA meter for the home or a sensor to control ventilation, schools and kindergartens For home Industry, projects Ventilation grille guide
Protective ventilation grillesGrille type by opening and purpose For home Industry, projects Aroma diffuser guide
Aroma diffusersHow to choose a diffuser by room size and purpose For home Industry, projects Frequency inverter guide
Frequency inverters for motor speed controlFrom 230 V mains to PROFINET: power, control and wiring For electricians Industry, projects HVAC automation guide
HVAC automationFrom sensor to controlled fan: signals, controllers and wiring For electricians Industry, projects HVAC sensor guide
Sensors and transmittersHow to choose a sensor for a ventilation and heating system For electricians Industry, projects HVAC guide
HVAC control solutions: heating, ventilationFresh air at home, in the office and on site: ventilation, heating and air quality For home Industry, projects Differential pressure switch guide
Differential pressure switches and gaugesFrom a filter alarm to smart control For electricians Industry, projects Liquid level sensor guide
Liquid level sensorsA sensor for water, fuel and wastewater For electricians Industry, projects Temperature and humidity sensor guide
Temperature and humidity sensorsSensor type, signal and mounting location For electricians Industry, projects Video surveillance
Guide What it helps to solve For whom IP CCTV camera guide
IP CCTV camerasCamera type, resolution, lens, night vision and recording For home Industry, projects PT CCTV camera guide
PT security camerasPan-tilt cameras: when they are worth it and how to choose For home Industry, projects Work safety and emergency solutions
Guide What it helps to solve For whom Work safety: LOTO, dielectric equipment and PPE guide NEW
Work safety | LOTO | dielectric equipment | work zoneWhat to choose for the job, equipment levels from an electrician to a company, LOTO sequence, glove classes For electricians Industry, projects Personal protective equipment guide NEW
Personal protective equipmentPPE for electrical work: helmets, gloves, fall protection For electricians Industry, projects Emergency safety shower guide
Emergency safety showers and eyewash systemsAn emergency shower and eyewash that works when it is needed Industry, projects Insulated electrician knife guide
Insulated cable and wire knivesInsulated knife for cables and wires: types and safety For electricians Facility maintenance: hatches and covers
Guide What it helps to solve For whom Large floor hatch guide
Floor access hatches with gas strutsA hatch with gas struts that opens easily and safely Industry, projects Tile-in floor hatch guide
Floor access hatches with hidden lockSize, infill and installation For home Industry, projects Composite manhole cover guide
Composite manhole coversSMC cover load class, dimensions and installation location Industry, projects Access panel with window guide
Plastic access panels with windowAccess to technical cavities For home Industry, projects Roof access hatch guide
Roof access hatches with gas strutsRoof hatch by opening and use Industry, projects Other
Guide What it helps to solve For whom Acoustic panel guide
Sound-absorbing foam acoustic panelsHow to reduce echo: panel type, quantity and layout For home Industry, projects Can't find a guide for your category? New guides are added all the time. In the meantime, send us your task and we will find a solution: tel. +370 658 01033, info@elsprendimai.eu, enquiry for engineers.
The guides are for information only. Product selection for a specific circuit and project is approved by a qualified specialist; UAB „Elektrotechnikos sprendimai“ is not liable for product selection based solely on the guides.
Catalogue updated: 2026-11-07
