Last Month the board fault was a breeze to solve with the TIS testing kit, now on earth let's find a home...
Every year new electrical innovation's are introduced to the world, but let's go back in time to when these ground breaking innovations were created.
Try to guess in what order these devices were founded.
Answer at the bottom
Although it's overlooked the CPC is probably the most important conductor, so let's learn more...
1. Sizing Your CPC
This is not used commonly in domestic installations, but if you do a lot of commercial work, this Adiabatic equation will help calculate the CSA of the CPC. When oversizing your CPC on a large commercial job, it can potentially lead to thousands of pounds wasted.
Ref: BS7671, Page 199, 543.1.3
2. CPC Colour Identification
The green and yellow colour identification combination shall cover from a minimum of 30% and at most 70%. For example 40% yellow and 60% green. This regulation is commonly misconceived to what percentage you should sleeve a cable.
Ref: BS7671, Page 132, 514.4.2
3. Un-insulated CPC
The CPC is intentionally not insulated in T&E cable to make sure that if the cable is accidentally cut or drilled, there's a higher likelihood of encountering the CPC first. This is an important safety measure.
TIS 560 AC & TIS 570 AC & DC Earth Leakage clamp meters.
Both instruments are massive time savers for board changes & finding AC leakage problems causing nuisance RCD tripping.
For the month of November, use promo code below for an extra 12.5% discount off of the usual ’street price’ for both products, taking them down to:
TIS 560 AC Leakage Clampmeter £105.00 +VAT
TIS 570 AC & DC Leakage Clampmeter £210 +VAT
Exclusive Discount Code: JIMBOLEAKAGE
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Why is being able to detect DC leakage so important?
DC leakage is now increasingly prevalent due to Electric Vehicle batteries, Solar PV & battery storage systems. If more than 6mA of DC leakage flows in a circuit, then all AC, A & F type RCDs will be ‘blinded’ & therefore may not trip in a fault condition.
The installation of a ‘B’ type RCD or ‘RDC DD’ would then pick up the pure DC leakage current & therefore trip if there is more than 6mA of DC leakage.
The bigger picture with detecting DC leakage is also that it can propagate to different properties, meaning a house without any DC current generating equipment could be effected by a neighbour who has - therefore the detection of DC leakage is vitally important. At the time of writing this proposal, the TIS 570 is the only combined AC & DC leakage clampmeter currently readily available on the UK market.
DC leakage, if left unchecked can also cause corrosion within the fabric of metal &/or metal reinforced buildings.
Ref: TISEarth Leakage Clampmeter!
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ANSWERS
A. 1642 = Calculator
B. 1800 = Battery
D. 1876 - Telephone
C. 1904 - Diode (C)
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Contact us here!The material and information contained in this newsletter is for informational purpose only, you should not rely upon the material or information on this newsletter, all readers must make their own judgment and seek professional advice when making decisions based on the context of the newsletter