ELECTRICAL TESTING IN GLASGOW

WES ELECTRICAL WESTEND GLASGOW 01418405236

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Safe method of isolation.



The recommended procedure for proving dead and safe isolation should be by use of a test lamp or two pole voltage detector as recommended in HSE Guidance Note GS38 regulations.
Non-contact voltage indicators and multi-meters should not be used. The test instrument should be proved to be working on a known live source or proprietary proving unit before and after use. All phases of the supply and the neutral should be tested and proved dead before any work is commenced by a qualified electrician.




Test sequence and descriptions of test procedures.



The following tests are carried out with the main board / Consumers main switch isolated



1. Extenal earth fault loop impedance (ohms)


Reason: To establish that a good earth exists at the electrical installation in order for the remaining tests to go ahead.


Method: Disconnect the main earthing conductor from the main earthing terminal at the main distribution board. An earth fault loop impedance tester is connected at line and earth (main earthing conductor) at the supply side of the electrical installation and a test performed. Reconnect the main earthing conductor. The result is Ze and recorded on the test sheet. The prospective fault current is measured at the same time after the reconnection of the main earthing conductor at the main board.


2. Continuity of protective and equipotental bonding conductors


Reason: To check that all circuit protective conductors are continuous and are present at every electrical outlet / accessory on the circuit. Also to check that the main earthing conductor and main bonding conductors are continuous and correctly connected at the terminals.


Method 1: The line conductor is connected to the circuit protective conductor of the same circuit at the consumer unit and a measurement taken at ALL accesories on that circuit between line and c.p.c. The highest measurement obtained is recorded on the test report. 
Test result is R1 + R2. The line conductor and neutral conductor are then connected and the above repeated to obtain R1 + Rn


Method 2 (used for main earth and main bonding conductors): A wandering lead is connected to one end of the conductor to be tested and a measurement taken between the other end of this lead and the other end of the conductor. 
Test result is R2.
During this test polarity can be checked as well. The continuity of the neutral conductor can also be checked to determine R2.


3. Continuity of ring final circuit conductors


Reason: This test ensures that all ring final circuits are indeed a continuous ring with no interconnects or breaks within it.

Method: The line, neutral and earth conductors of the circuit are identified and a measurement from one end to the other end of each is taken. These results are r1, r2 and rn. 
The incoming line conductor is then connected to the outgoing earth conductor and the outgoing line conductor is connected to the incoming earth conductor. A measurement is then taken at ALL socket outlets on the ring. The highest of which is recorded on the report. 
This result is R1+R2 for that circuit. The above is then repeated using the neutral conductor instead of the earth conductor. This test provides R1+Rn which does not need to be recorded on the report but is essential to check the circuit correctly.


4. Insulation Resisitance testing


Reason: This test checks whether the insulation around a cable is still intact and has not broken down over time or has been separated from the rest of the ring. It is a good indicator of the age of an installation.

Method: An insulation resistance tester is connected across line and neutral tails at the origin of the supply. 500V are then pumped down the conductors to see if any voltage leaks across from one conductor to the other. The same is then done for the line and earth and the earth and neutral conductors.


5. Polarity checks


Reason: To check that all accesories are correctly connected to line, neutral and earth and that all switches and circuit breakers are connected in the line conductor only.

Method: The method for this is the same as for continuity and is usually done at the same time by operating switches etc whilst conducting the test.


6. Earth electrode resistance


Reason: To make sure that any earth electrode used is of a sufficiently low impedance to allow the timely operation of the RCD protecting the installation.

Method: An earth fault loop impedance tester is connected between line and earth at the origin of the supply and a test performed. The result of which is considered the resistance of the electrode (Ra).



The following tests are carried out with the Consumers main switch switch in the on position




7. Live polarity testing


Reason: To verify polarity of supply authorities system.


Method: An approved voltage indicator shall be used or test lamp to GS38. Using the approved voltage indicator, one probe shall be placed on the incoming neutral, and the other on the incoming line conductor, on the main breaker. The indicator should show it is live. One probe shall now be placed on the CPC and the other on the incoming line conductor. The indicator should show it is live. A test shall be preformed between CPC & incoming neutral. The indicator should show that it is not live.


8. Earth fault loop impedance


Reason: This test is done at the furthest point on a circuit in order to make sure the impedance of the earth path is not too high even at the furthest point so that sufficient current will flow under fault conditions to take out the circuit breaker protecting the circuit.

Method: An earth fault loop impedance tester is connected to line and earth at the furthest point on the circuit and the test performed.


9. RCD testing


Reason: To make sure RCD's trip within the correct time

Method: An RCD tester is connected and a test at 1/2 times, 1 times and 5 times the trip current is performed on each side of the cycle and a time of trip obtained. Usually milli-seconds with the highest being recorded. The manual test button is then pressed.


10. Functional testing

Reason: To make sure all switches, isolators, MCB's etc. work as they should.

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PAT TESTING GLASGOW

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Almost every person responsible for Health and Safety In Glasgow, at the workplace has, at some point, had to consider how important the need for PAT testing is. Many people claim it’s a legal requirement – but is that a fact or a myth?

As we know that Health and Safety is so important to employers – yet surrounded by so much confusion - we offer a 4-day comprehensive Health and Safety course which is accredited by IOSH (the Institution of Occupational Safety and Health). Of course, protecting your employees from harm is your number one priority – but there are lots of other benefits of Health and Safety training as well.

Here are words from our trainer, Andrea, on the subject of PAT testing - and other Health and Safety myths.

What are PAT Tests?

Portable Appliance Testing is simply a way of checking electrical items to ensure they don’t pose a danger Tested by a qualified person / electrician in Glasgow

The Big Question - Do You Need PAT Testing?

Whilst the Health and Safety at Work Act places an obligation on employers to take practical steps – such as PAT testing – to ensure their employees don’t come to harm, the truth is thatPAT testing is not a legal requirement at the moment in the UK. The fact that it’s one of the most frequent – and hard-sold – services by cold callers means that many companies are lead to believe that they have to test their portable appliances every year. But one of the most important things about PAT Testing, is the fact that the testing is done to ensure the safety of people using the equipment. It can also help in isolating a fault that is plugged into a circuit.Call today for a free quote in the west end Glasgow

Health and Safety in the News

We read so much about daft rules made in the name of health and safety that we could be forgiven for believing that much, if not all, health and safety legislation is stupid, bureaucratic, over-complicated and unnecessary -  a view which seems to be promoted by certain sections of the press at regular intervals.

Headlines such as “Bosses at Butlins Ban Bumper Cars Over Health and Safety Fears”, “Conker Time Dangers” and “Housing Association Warns of Ban on Hanging Baskets Amid Safety Fears” frequently appear and purport to reflect requirements of health and safety legislation – all refuted by the HSE as myth.

You may have read in the newspapers or seen on the television last year a report about the Royal Academy painter who was told to move his easel from Trafalgar Square over health and safety fears.  But you probably won’t have seen the letter sent from Judith Hackitt, Chair of the Health and Safety Executive (HSE) in response:

“I share your dismay with the petty limitations and restrictions with which some seem intent on burdening those of us who just want to get on with living our lives. I would be interested to know whether there is any real or valid reason for the restrictions you continue to encounter, because I can promise you they have absolutely nothing to do with health and safety.

“Real health and safety is about dealing with risks that are likely to cause serious harm or even death to those in workplaces. I would urge you to challenge those jobsworths who persist in devaluing the real and important stuff by using "elf 'n' safety" as an easy excuse for spoiling everyone else's enjoyment.”

Health and Safety Myth-Busters

The ridicule of health and safety in the press is far more widespread than just the media - the promulgation of these popular myths trivialises genuine health and safety requirements and legislation. This has become such a concern that the HSE has set up a Myth Busters Challenge Panel. The purpose of the panel is to “provide a mechanism for anyone (whether on behalf of a company or organisation, or as an individual), who receives advice or is told that a decision has been taken in the name of health and safety that they believe to be disproportionate or inaccurate, to challenge that advice.”

The question of PAT testing under the Electricity at work Regulations is a very good illustration of this point. Here is the advice from the HSE following a question given to the panel:

“Unnecessary electrical safety tests cost office-based businesses an estimated £30 million a year.

“It's a myth that every portable electrical appliance in the workplace needs to be tested once a year - and what's more it's a costly one.

“Misleading advice and advertising, often by companies who offer the testing, is contributing to low-risk businesses such as offices, shops and hotels paying unnecessarily for over-the-top maintenance regimes.

“The law simply requires an employer to ensure that electrical equipment is maintained in order to prevent danger - it does not state that every item has to be tested or how often testing needs to be carried out.

"Testing appliances to ensure that they are safe to use can contribute to an effective maintenance regime, but in a low-risk environment most dangerous defects can be found simply by checking the appliances for obvious signs of damage such as frayed cables.”

So, in essence, although you are not legally required to pat test your electrical equipment annually (or at all); common sense would suggest that if electrical equipment is used in such a way that it is likely to become damaged in use, then inspections at regular timed intervals would be a wise precaution to prevent potential accident or injury.

Still not sure what to do?

First, have a look at the Direct Gov website for details of what is required in terms of employers’ health and safety responsibilities.

Proper Health and Safety training is then needed to ensure you have proper understanding of your responsibilities and practical training in risk assessment, hazard identification and measuring performance. Our 4-day Health and Safety training is accredited by IOSH – and is a firm favourite with our clients.

There is some very useful information, including a very interesting case study on the HSE website, which also gives helpful and practical guidance and advice on portable appliance testing - although probably not such good reading for those jobsworths who use elf ‘n’ safety as an easy excuse for spoiling everyone else’s enjoyment!

WESTEND GLASGOW ELECTRICIANS

Smoke Detector Installations Westend Glasgow

                   SMOKE DETECTOR INSTALLATION

 

Friday afternoon is usually a quiet one maby for a trip to braehead or maby a game of gold with some business friends but not this friday. Today we had some smoke detectors to install for one of my clients. One the one hand i only had 5 smoke detectors hard wired and 1 co2 detector to install, but on the other hand i was doing this job on my own. At first look the job look as if it would be straight forward in and out as it was a top floor flat and that means i have access above the ceiling. If i only took 5 extra mins to have a look in the attic as it was not even double floored it was tripple floored for some strange reason meaning i cant just drill a whole from inside the flat and catch the cable in the attic, i would need to drill through the other 2 floors to catch the cable, so what has been a couple hour job, had turned into a 5 hour monster as i had no one to call at 1pm on a friday.

 

As a mark of quality we use kidde products as i feel they are the best and are standard for landlord installations. 5 of them on a loop with the co2 detector.

 

WES Electrical are the leading electrical contractor in the Westend Glasgow For landlords, HMO Flats and specialist installations

 

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LED Lighting In the home.

For most of my customers in Glasgow the issue of lighting is never a dull subject to discuss, with the advancement in LED technology, the dawn of the new more powerful and colourful led lamps is upon us. I can assure customers that if the purchase the led lamps i recommend for their lighting the would not notice much in a way of difference in light but a significant reduction in the cost of running their lighting in the home.

The UK is in the top five nations in Europe for buying energy saving light bulbs, but lagging behind in the purchase of ‘next generation’ lighting such as LEDs.

More testing, information and certification of the kind we’re involved in through the PremiumLight scheme should certainly help increase consumer confidence. But outside the domestic market, it seems companies do not need much extra convincing.

Forbes grandly decreed recently that “LED retrofits are the ‘Trojan horse’ of the Internet of Things” with the market for just sensors and applications related to LED lighting set to more than double to 2020. This is not so surprising at all if we are to take the Carbon Trust’s director of implementation Myles McCarthy at his word:

A business, such as a warehouse or large hotel, can save up to 70% of its electricity costs by switching to LED lights with motion sensors…and receive a payback on the capital outlay within two years.”

Efficiency, cost reductions and the kind of light quality benefits that we saw in our Lit Up report on LED lighting in social housing schemes in Westend Glasgow are a potent combination.

Increased take-up of new technologies tends to mean falling prices and a growth in demand for fittings and extras – in this case those extras which play into the idea of a future of smart energy management. The future is suddenly looking very rosy indeed for LEDs. And that’s before we’ve even touched ‘Li-fi’.

Yes, that’s right – LED-based Wi-Fi connectivity may be another imminent boom to the LED industry, with a tussle for technological supremacy seemingly opening up between the UK and China.  Visible light communications, or VLC, can produce high data speeds at low cost, and while there was some scepticism about recent claims of a breakthrough in Shanghai, a British collaborative study seems to have backed them up.

Micro LED bulbs can handle millions of changes of light intensity, which can in turn transmit data. Parallel streams of light can multiply the amount of data transmitted – something likened water out of showerhead by a University of Strathclyde scientist.

Whether we’re bathing in an LED glow or using LED light to stream a video, this is certainly a technology we’re going to be well acquainted with over the coming years.

WES ELECTRICAL 

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