Home electrical wiring, symbols and checking

This article explains the basics of home electrical wiring and its symbols. There is also a simple guide on what to check at the end of the post.
However, this is a long article. If you can see what you are looking for at the RELATED ARTICLES section below, you may want to visit that post first.
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House electrical symbolsSimple house

Cable duct crossing roadside drain

Today I have uploaded a few photographs of underground cable ducts crossing a roadside drain at a project site a couple of months ago.

Photo 1 – Underground electrical ducts crossing a roadside drain



A good design of external electrical works would have considered the situations where all the different services would cross each other.

Even when they do not cross each other, the space where

Electrical cable ladder pictures

Below is a picture of cable ladder installation. I only have time for this picture today, but you will be able to see more installation pictures of this component of electrical installations soon. However, you can see more pictures of electrical installations in my other posts on this blog by visiting this anchor post, Free electric installation pictures. You can also see cable tray pictures at

Emergency light installation pics

I have uploaded few pictures showing the method of installing a ceiling-recessed emergency lighting (EL) unit. This work was photographs at a high-rise building construction a few months ago.

As far as the choice of types of the EL light, I would personally prefer a surface mounted self-contained type. The one being installed in this picture is also a battery-backed self-contain type, but it is

Free electric installation pictures

I thought the word free pictures in the post title would attract a few extra visitors to this electrical installation blog. We will see whether it works or not.

Photo 1 - Electrical services inside a building


Jokes aside, actually I received a few emails from some friends in the education business (i.e. local universities) complaining that they like the real construction pictures and the

Electrical DB pictures

I have uploaded below a few pictures of electrical DB being installed at a high-rise office-building project. I only have enough time for these few pictures today, but I will be sending a more detailed post on the DB installation soon. Plus a few more of the DB pictures maybe.In the meantime, if you have the time, check out the following link. It is a link on how to convert your car into an

Temporary site floodlights

Large construction sites usually need temporary floodlight towers (in addition to the temporary lighting inside the new buildings) to provide lighting efficiently for the general movement, safety and security on the external areas of buildings under construction.

xxxxxxx RELATED PICTURES: High mast flood lighting | Temporary lighting installation xxxxxx

The lighting towers will usually takes

Cable trays and ladder installation

I have uploaded a few pictures and a diagram on the installation of electrical cable trays and cable ladders for those who have some need for them. At the end of these pictures, you will also find a sample specification for the cable tray and cable ladder installations in multi-storey office buildings. If you wish to see more photos of electrical installations, this post, Free electric

Temporary Electrical Installations

This post will present you with pictures of temporary electrical installations, the temporary switchboards (at this post, Temporary electrical switchboard), temporary electrical DB, temporary cables and poles.

The post is open ended. I will keep adding more pictures and comments when I find something that I think the readers will be interested in.

Someone also commented that I have yet not