Guides – TOKSEL Elektrotechnik https://tokselelektrotechnik.com/en/guides/ Guides on DGUV V3, surge protection, wallboxes, meter cabinets, rewiring and switchgear – German rules explained in English for the Cologne region. en-GB © TOKSEL Elektrotechnik UG (haftungsbeschränkt) Thu, 15 Oct 2026 06:00:00 GMT https://tokselelektrotechnik.com/brand/icon-512.png Guides – TOKSEL Elektrotechnik https://tokselelektrotechnik.com/en/guides/ DGUV V3 inspection: obligations, intervals and procedure for businesses https://tokselelektrotechnik.com/en/guides/dguv-v3-inspection-germany/ https://tokselelektrotechnik.com/en/guides/dguv-v3-inspection-germany/ Thu, 15 Oct 2026 06:00:00 GMT Testing & safety Anyone who employs staff in Germany must have electrical installations and equipment inspected regularly. We explain the obligations, the guideline inspection intervals and how a DGUV V3 inspection works. Surge protection: when is it mandatory under DIN VDE 0100-443? https://tokselelektrotechnik.com/en/guides/surge-protection-requirements-germany/ https://tokselelektrotechnik.com/en/guides/surge-protection-requirements-germany/ Thu, 15 Oct 2026 06:00:00 GMT Protection Lightning strikes and switching operations generate voltage spikes that destroy electronics in a fraction of a second. When protection is mandatory in Germany and what a sensible protection concept looks like. Installing a wallbox: registration, § 14a EnWG and what to check beforehand https://tokselelektrotechnik.com/en/guides/wallbox-installation-germany/ https://tokselelektrotechnik.com/en/guides/wallbox-installation-germany/ Thu, 15 Oct 2026 06:00:00 GMT E-mobility A wallbox charges faster and more safely than a household socket. For everything to run smoothly, the connection, registration and controllability should be right from the start. GEIG: charging point obligations for commercial properties and residential complexes https://tokselelektrotechnik.com/en/guides/geig-ev-charging-obligations/ https://tokselelektrotechnik.com/en/guides/geig-ev-charging-obligations/ Thu, 15 Oct 2026 06:00:00 GMT E-mobility Since 2025, larger non-residential buildings in Germany have needed at least one charging point. We show what the GEIG requires for new builds, renovations and existing buildings, and how to implement the requirements cost-effectively. Replacing a meter cabinet: when it becomes necessary and how the process works https://tokselelektrotechnik.com/en/guides/meter-cabinet-replacement-germany/ https://tokselelektrotechnik.com/en/guides/meter-cabinet-replacement-germany/ Thu, 15 Oct 2026 06:00:00 GMT Electrical installation Wallbox, heat pump or photovoltaics – often it only becomes clear during planning that the old meter cabinet no longer meets the requirements. How to recognise this and how the replacement works. Rewiring older buildings: warning signs, process and what matters https://tokselelektrotechnik.com/en/guides/rewiring-older-buildings-germany/ https://tokselelektrotechnik.com/en/guides/rewiring-older-buildings-germany/ Thu, 15 Oct 2026 06:00:00 GMT Electrical installation Many older buildings in Cologne still have electrical wiring from the 1950s to 1970s. We show when a refurbishment is necessary, how it works and how to get your house ready for a wallbox and heat pump. RCDs and arc fault detection devices: what is mandatory and what makes sense? https://tokselelektrotechnik.com/en/guides/rcd-afdd-requirements-germany/ https://tokselelektrotechnik.com/en/guides/rcd-afdd-requirements-germany/ Thu, 15 Oct 2026 06:00:00 GMT Testing & safety The residual current device (RCD) saves lives; the arc fault detection device (AFDD) detects dangerous arcs. We explain when each device is required in Germany and where retrofitting is worthwhile. Planning a low-voltage main distribution board (NSHV): a guide for commerce and industry https://tokselelektrotechnik.com/en/guides/planning-low-voltage-main-distribution/ https://tokselelektrotechnik.com/en/guides/planning-low-voltage-main-distribution/ Thu, 15 Oct 2026 06:00:00 GMT Switchgear The main distribution board determines how safe, available and expandable a building's power supply is. This guide shows the most important planning steps – from the load calculation to routine verification. Switchgear retrofit: modernising during ongoing operation https://tokselelektrotechnik.com/en/guides/switchgear-retrofit-during-operation/ https://tokselelektrotechnik.com/en/guides/switchgear-retrofit-during-operation/ Thu, 15 Oct 2026 06:00:00 GMT Switchgear Spare parts discontinued, power demand increased, safety standards outdated: many switchgear installations have to be modernised while operations continue. Here is how a retrofit succeeds. Connecting a heat pump electrically: service connection, meter board and § 14a EnWG https://tokselelektrotechnik.com/en/guides/heat-pump-electrical-connection/ https://tokselelektrotechnik.com/en/guides/heat-pump-electrical-connection/ Thu, 15 Oct 2026 06:00:00 GMT Energy transition A heat pump is not just a heating matter. For it to run efficiently and safely, the service connection, meter board and control system must be right. Here is what to look out for when planning.