Pictures of electrical wiring

I have uploaded many pictures of electrical wiring to this blog. Now it has started to become difficult to find the pictures related to specific titles such as the wiring, etc. It will become worse as I send more post and pictures.

Picture 1 – Electrical DB wiring



Because of that, I will periodically send a post that will become an “anchor” for a specific title.

This title on wiring is one such example. Instead of being a normal post, it will generally function as the index page for posts and pictures of electrical wiring that I have sent to this blog.

So when you are looking for pictures of electrical wiring works, you can either look at the post list (i.e. BLOG ARCHIVE) at the right column of this blog page, or you can come to this post directly and scroll down to see if there is anything that interest you.

Of course, there is another way, which is by clicking the relevant “label” titles at the bottom of each page.

However, using the “label” will open all posts that have been tagged with that label in a single page. Readers with slow connections may not like the waiting when the pages are heavily loaded with graphics such is this blog.

Moreover, if multiple “labels” are opened simultaneously, readers with small RAMs may cause their computers to crawl, or even hang.

The best way is to come to an anchor post like this, which provides a short summary to posts related to a specific broad title. The graphic loading is also much less heavy because only one or two pics are added for each related post.

I have already send anchor post for other titles:

Temporary electrical installation pictures
Temporary electrical earthing pictures
Temporary lighting installation pictures
Electrical installation pictures


I will add more if there are more that three or four posts related to a specific title.

Now let’s get back to the DB wiring pictures.

Picture 1 show a house electrical DB with the cover removed.

Taken from this slightly lower angle, you can see the LIVE busbar of the DB.

Picture 2 below shows the wiring from the higher position. Here the outgoing wiring of the MCB’s (miniature circuit breakers) can be seen more clearly.

Picture 2 – Distribution Board Picture



I will not talk in detail about this wiring here. You can read a more detail description of the wiring at another post, 1-Phase ELCB Connection Pictures.

There are more pictures of this electrical DB there also.

Diagram 3 – Lighting layout and wiring details



Prior to installation of the electrical wiring conduit and trunking, the position of all fittings including the light switches, the socket outlets and lighting points must be determined.

Diagram 3 above shows examples where the light switches should be located.

I have sent a post with some pictures on the installation of lighting switches for office buildings here, Light switch installation pictures.

If you are looking for house electrical pictures, I have a post here, Home wiring pictures.

This article is not very good. It was actually a draft that I did at the time I started this blog. Suddenly something else demanded my urgent attention. That was why I did not have now post sent to this blog for a few months.

I posted the draft article anyway. I will come back to it some time soon with the final version and some pictures that may be useful for the readers.

Picture 4 – Internal wiring of an office DB showing the installation and wiring work in progress



Picture 4 shows the internal wiring of a DB for lighting and small power.

This DB was installed at a multi-storey office building. The internal wiring that has been done as shown was actually done at the factory.

That is why you cannot see any outgoing wiring from the MCB’s at the upper part of the panel.

You can see more pictures of this DB and other switchboards at this post, Switchboard earthing pictures.

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How To Test An Emergency Light

An emergency light (EL) is an emergency equipment.

Like all emergency equipment, we do not need it unless we are in a state of emergency.

Picture 1 – An emergency light fixture

It is also a safety equipment, which means that we need it to prevent danger, to reduce the risk of personal injuries, to prevent loss of lives or properties.

There is a problem common to most emergency or safety equipment. It is not used or not in operation most the time. In other words, it is always on standby.

This is how the problems develop.

When an equipment is seldom used or operated, it may not work at the moment it is supposed to work.

Poor workmanship during installation, low quality components, etc may cause failures in parts of the equipment.

These failures are not noticed until an emergency situation arises. Then it would already be too late.

Another example is the standby electric generator. Many buildings rely on the standby generator as part of the fire protection system for the building.

However, because it is seldom used, many times the generator cannot start when there is a fire and the main supply fails.

Of course, we have the emergency lighting to aid us in evacuating the building.

But then again, what if the emergency light also fails at some place in the building?

The occupants in the room can be left in total darkness. Accidents can happen which will make the situation much worse.

This is why the emergency light should be checked regularly and it is easy to do it.

How to test an emergency light

Picture 2 – A close up view of a surface-mounted emergency light



Picture 2 above shows the close up view of the emergency light in Picture 1.

MAINS HEALTHY light

The MAINS HEALTY light is an LED light. Under normal condition, this LED would give out red light. I took this picture while the building is under construction. The mains electricity from the public supply is still not connected. That is why this LED did not light up yet.

If the red LED lights up, that means the building supply is connected to the EL light unit. Therefore, the rechargeable battery inside the unit is charging.

The battery is always charging to keep it at full charge all the time. There is an electronic circuitry inside the fixture that automatically charges the battery to keep it full all the time.

However, even when the battery is fully charged, the LED stays ON. Do not expect the LED to light off when the battery charge is full. This light only says that the electricity supply is available.

In some design, the LED may also be used to say that the internal electronic charging circuit is also working properly. In other words, it summarized the status of the health of the charging part of the EL light fixture.

The TEST pushbutton

This pushbutton switch allows you to check if the lamp would light up when the building electricity supply really fails.

To test it, just press the red pushbutton switch.

The EL lamp will light up.

With the charging circuit healthy and the operation test of the lamp also okay, you now have no worry about your emergency lighting.

With recessed mounted EL lights, the test is also similar. Picture 3 below shows a ceiling-recessed EL light.

Picture 3 – Ceiling-recessed emergency light




You can see more pictures of the emergency lights at this post, Emergency lighting installation pictures.

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