Can you please help me?  - Page 1
Forum section: electronics / repair

author: jindaohan
author_rank: Newbie
timestamp: August 26, 2025, 08:32:04 pm
content: Can you please help me? Almost all the bulbs in the shop are exploding. What is the reason for this? By the way, there is no grounding line in the shop. Could this be because of the LED bulb used, between 5 watt and 8 watt? Almost all of the LED bulbs are exploding every day. Why are they exploding so much?

author: jindaohan
author_rank: Newbie
timestamp: August 26, 2025, 08:49:41 pm
content: This is the LED bulb I used

author: fzabkar
author_rank: Super Contributor
timestamp: August 26, 2025, 09:12:26 pm
content: Call your electricity provider. There may be an open neutral in your supply. And what's the reason for a lack of grounding??

author: Kwakerman
author_rank: Regular Contributor
timestamp: August 26, 2025, 09:29:38 pm
content: What do you mean by 'exploding'? Are they just burning out or literally going up in flames? Also do you mean the individual LEDs in the lamp or every lamp in the workshop.What country are you in (don't recognise the flag in your profile), are you in a 230 Volt region. Is your electricity from a state provider or by generator or solar?

author: kite31
author_rank: Regular Contributor
timestamp: August 26, 2025, 11:43:01 pm
content: Hover over the flag to see its country.

author: jdragoset
author_rank: Frequent Contributor
timestamp: August 27, 2025, 12:14:28 am
content: Bulbs in the shop.What about in the main house?Are LED bulbs rated 120V or 240VSometimes a chart recorder/data logger may be needed.Given proximity to turmoil, use less expensive lighting.

author: bombcat
author_rank: Contributor
timestamp: August 27, 2025, 01:22:06 am
content: Lighting bulbs usually do not require a ground wire, and if the wrong nominal voltage bulb is not selected, it may be due to excessive surge voltage or current shock in the area where the store is located. Please call the power management department to check the power quality and whether it meets the standard. If you are using self-generated, check the equipment and install a voltage stabilizer. Choose to use a wide voltage input bulb.The power of the bulb will not affect use unless the store is far from the power transformer and the total power is too large, resulting in a decrease in voltage. If the bulb failure occurs only when the main power switch is turned on, turn on the segmented section. Turn off the segment switch first, then turn on the main power supply, and then turn on the segment switch. When resting, turn off the segment switch before turning off the main power.

author: jindaohan
author_rank: Newbie
timestamp: August 27, 2025, 05:08:03 am
content: The LED bulb I use does not work and flashes after a certain period of time. There is no grounding in the building, or rather, I converted the lower floor into a shop.

author: jindaohan
author_rank: Newbie
timestamp: August 27, 2025, 05:11:33 am
content: After about 1 or 2 weeks, all LED bulbs no longer work and they stop working on their own.

author: bombcat
author_rank: Contributor
timestamp: August 27, 2025, 05:52:55 am
content: Check the power voltage, which needs to be consistent with the lamp voltage。

author: NE666
author_rank: Frequent Contributor
timestamp: August 27, 2025, 07:06:26 am
content: For goodness sake stop messing around on forums and engage a qualified electrician before something worse happens than a few popped bulbs.Although I suspect you know full well that they're going to condemn a system with no protective earthing, and which amateurs have been playing with.

author: Kwakerman
author_rank: Regular Contributor
timestamp: August 27, 2025, 07:36:55 am
content: Quote from: kite31 on August 26, 2025, 11:43:01 pmTried that to start with but nothing came up, also it wasn't the Union Jack at that time so I think OP has updated his profile.

author: kite31
author_rank: Regular Contributor
timestamp: August 27, 2025, 07:50:29 am
content: Quote from: Kwakerman on August 27, 2025, 07:36:55 amYou are right, it was Belarus back when I replied. Well, mine's true.

author: jindaohan
author_rank: Newbie
timestamp: August 27, 2025, 07:54:36 am
content: Note: I am from Belarus but I live in England.

author: Haenk
author_rank: Super Contributor
timestamp: August 27, 2025, 08:01:05 am
content: If you built a "shop" (I assume a workshop) - electric devices like motors will create spikes and noises in the power line, which might kill all sorts of other electric devices connected to the grid. The LEDs don't have any sort of line filtering implemented, so any "switch on/off" line noise will hit them directly.You'll need an electrician and have him record mains power quality over a certain period of time.

author: Gyro
author_rank: Super Contributor
timestamp: August 27, 2025, 08:17:39 am
content: Quote from: jindaohan on August 27, 2025, 05:08:03 amThis all sounds highly suspicious. I am beginning to think that "shop" means retail shop of some description. All properties in the UK have grounding (Earthing). Either imported from the mans supply (TN--S, TN-C or TN-C-S) or via local earth electrode (TT). There are all sorts of legal regulations regarding conversion of part of a house into a retail shop, you can't just go ahead and do it.Call the local electricity provider (DNO) urgently and also call an electrician. Do not allow members of the public to enter!P.S. Photos of the electrical installation, both at the mains entry (main fuse and meter) and also the wiring in the shop, would help us understand.

author: tggzzz
author_rank: Super Contributor
timestamp: August 27, 2025, 08:34:08 am
content: Quote from: jindaohan on August 26, 2025, 08:32:04 pmQuote from: jindaohan on August 27, 2025, 07:54:36 amQuote from: jindaohan on August 27, 2025, 05:08:03 amIn the UK, bulbs do not repeatedly explode in an installation that conforms to the wiring standards. If they do, then the wiring is clearly very dangerous and must be disconnected immediately.In the UK there must be a protective mains earth. Anything else is dangerous and illegal.If the person working on the wiring is not "competent" (which seems probable) then the installation is illegal and may be dangerous. Certainly the insurance will be void, so there will be no payout in the event of a fire etc.Obviously I have no idea whether you own the property or not, but such modifications would be a nightmare for a tenant or for a landlord.TL;DR is that youmust immediatelyget a qualified electrician and/or the electricity company to inspect the installation.

author: Haenk
author_rank: Super Contributor
timestamp: August 27, 2025, 11:13:22 am
content: (just another idea: How old are these LED? Maybe the smoothing cap has dried out over the years, which would explain the flickering?)Anyway: If the is no grounding, you need to call an electrician ASAP.