Electricity
Wiring, switches and sockets, consumer units and REBT regulations.
A surge protector and a UPS solve different problems. When to recommend each in an electrical quote.
The power control switch limits the home's contracted power. Who fits it, where it goes and what happens if it doesn't match the real power.
The "boletín eléctrico" and the Electrical Installation Certificate (CIE) are not the same. When each document is needed to connect the supply.
Installing photovoltaic self-consumption means adapting part of the existing electrical installation. What elements to quote besides the panels.
Switches, sockets and frames vary greatly in price depending on the range. What the difference is between basic, mid and premium, and when the spend is justified.
The lumen, not the watt, is the unit to look at when quoting LED lighting. How many lumens per m² each type of room needs.
You don't need a complete home automation system to add value to a renovation. Which smart accessories are installed most and how much they cost compared with conventional ones.
Not every socket in a home needs an earth connection, but confusing where it is mandatory can leave an installation unsafe or non-compliant.
Spain's Technical Building Code requires smoke detectors in new homes and major renovations. Where they go and when a carbon monoxide detector is also needed.