I do some electrical maintenance for a local church, the main hall is lit by around 12 LED floodlights, (they do look cheap) they seem to be constantly dying, they have asked if a wood work shop across the road could be causing this, with saws and other machinery constantly starting up, I’ve...
Hi all & thanks in advance for any feedback.
Could anyone tell me the correct Lock off device used to safely isolate a 4 pole main switch?
I'm not 100% sure if the isolation device with the prongs is the correct device to be used or if another lock off device is necessary.
Pics attached...
Hi all.
I am undertaking an assessment next week called SAFE ISOLATION OF SUPPLIES.
It involves isolating and securely locking off a circuit to be worked on. The 4 items to be isolated is THE WHOLE INSTALLATION, A 3 PHASE CIRCUIT, SINGLE PHASE CIRCUIT & LOCAL ISOLATION (which is an isolator...
Hi I have come home and at the bottom of my drive way have noticed this thing bolted about 7ft up the telegraph pole with a laser/laser radiation warning sticker on it.
Anyone know what this is and what it does or what all the numbers mean?
PoE details:
Input: AC 100v~240v- 50/60Hz 0.3A max
Output: DC 24v 0.5A
PoE injector is used to convert mains AC into DC and power IP devices such as CCTV cameras and Wifi APs. These devices are designed for worldwide sale and are also widely used in the US and alike on 110v supplies. The only...
Can anyone recommend an lock off device that works well on an 60947-3 main switch.
Most of them that I have seen come as a kit with lots of tatt thrown in that I do not need such as the padlocks, labels and cable ties etc, and are seriously overpriced?
How do I lower the amperage output best for a device that will suck my car battery dry without loosing too much energy?
There are several methods but I would like to know a way to say get around 1 ampere max out to my device the most energy efficient way. Not loosing too much to heat.
The...
The regs state 717.413 a Isolation transformer and insulation monitoring device should be used.
Are there any guidance notes on type or makes i should be looking for.
I see you can get 230V primary 230V secondary boxes but i'm also not sure on which to get in terms of load..
I'm inspecting this...
Hi guys, I'm having trouble deciphering some manufacturer's specifications / installation instructions for a three phase dual 32A outlet EV charger.
The model in question is the W22 wall mounted unit:
I can see that there are 2x 30mA RCD's inside the unit mounted on DIN rail.
I'm unsure...
ive got a gaming device that has lots of switches, servos and backlighting in it. It’s powered by 5v for main power, 5v for servos and 12v for backlighting.
It all sits in a metal case.
Just recently I’ve had a strange problem when using it that when I touch certain switches or even if I touch...
I've two Vibro Graver V-74 electric engravers (120V 60Hz) with me. I gave one to a friend who recently moved to another country. He got a step down converter to 110V but then he noticed the frequency used there is 50Hz.
What would the effects of using the device on a 110V 50Hz supply when the...
I'd would like to know if/how to turn on a second device (220V fan) when another device starts working automatically (air compressor).
The idea is to have both always plugged to the electricity, but the fan working only when the air compressor kicks in. Could someone guide me how to do it...
Hi, i'm only a student so please forgive me for the basic question:
Say you have a generator or power transformer serving a main mccb panel, why can't the main switch of the panel be just an isolator? I've only seen the main switching device as a mccb or acb.
I know that in a house you'll have a...
Hi hope someone can help, i need to record the protective device on a MWC and not sure which to enter.
I have removed an old bathroom heater on a 20A radial and rerouted cabling to feed an RCD FCU, the load side of which feeds into the bathroom serving towel rail with a local DP (20A) switch...
I am busy doing some work with a local contractor to get some up to date hands on experience.
whilst doing a EICR today i come across a CU with SPD in. The property is a recently built 5th floor flat about to be let on a new tenancy and meets the criteria for requiring a SPD. The whole set up is...
Graham Hyde
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surge protection
Noise filter will be in between wall 240V and device.
If the device is rated at 10AMPS then what AMP noise filter is required? Is it 20% above device rating?
regards.
Noted today an interesting comment on page 43 of christopher kitchers Practical guide to inspection, testing and certification of Electrical Installations ( a great book )
Under Shower curcuits he states:
For this type of circuit it is possible to have a cable which has a current rating of less...
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