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Renovations 3-phase wiring
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stormer.lyn
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 Nov 20 2021, 01:55 PM
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QUOTE(gilabola @ Nov 20 2021, 12:35 PM) While renovating my house, my contractor said the 3 phase DB Box had sparks. He recommends replacing the part circled at a cost of RM500. I'm wondering if the contractor is trying to pull a fast one Any advise if the cost is reasonable Nope, doesn't sound right that the Neutral busbar needs to be replaced. If it is sparking why not just redo and tighten back the screw terminals? If an individual screw terminal is damaged, why not just move the slot, as you have so many empty ones? (FYI I am not an end user just giving my so called "opinion", but a tech in the industry) |
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stormer.lyn
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Apr 12 2024, 07:36 AM
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QUOTE(vicky.max @ Apr 11 2024, 10:13 PM) Hi all, My new 'semi-d' house came with single phase electricity unfortunately and am currently exploring options to have it upgraded to 3-phase. From what I heard from my electrician, it seems that the supply from TNB to my house meter (at the front gate) is already 3-phase but this dumbo developer, for somewhat reason, pulled single phase from the meter to DB / house. If I need to upgrade to 3-phase, need to hack the internal wires / cables in my house? Means from the meter all the way to the DB box? (in store room). Yes (unless the wires are running in a service pipe and you can add wires without hacking) |
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stormer.lyn
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Apr 12 2024, 07:46 AM
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QUOTE(malcolm86 @ Apr 11 2024, 11:02 PM) have u tested amp with multimeter during full run? i tested mine 2.5+1.5+1.5 hp non inverter ac running together = 23amp Or just total up the HP and multiply by 5 for a rough estimate of consumption. |
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stormer.lyn
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Mar 20 2025, 10:17 PM
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QUOTE(michaelangelo @ Mar 20 2025, 05:23 PM) hi guys my house is running 3 phase and currently I redo the whole wiring for the house. The electrician told me for main switch to use 63Amp and the ELCB 40A 300mA - one for switches and another ELCB 40A for 13A plugs. So when there is a trip, we can know whether it's from the plug or the lighting/fan. May I know if this is the right way to do? Residential cannot be using 300 mA anymore. Has to be 100 mA for lights, and 30 mA for sockets. Also there has to be 10 mA protection for wet areas. Also why is the incoming 63 A but the protection 40 A? |
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stormer.lyn
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Mar 21 2025, 06:34 PM
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QUOTE(michaelangelo @ Mar 21 2025, 07:22 AM) The electrician said 40A is enough as we split it into 2 - one for lights and one for 13A sockets. He totalled it and said 40 +40 is good enough.. He said he usually use 300mA and no problem and cheaper..but I m buying the stuff now so I want to make sure to use the correct ELCB, MCB He also said if use 100mA will be easier to trip when there is lightning but I also added Surge Protector (SPD ) to the DB. So the protection should also be 63A? Just because you split into 2 you think the electrical current will respect your split and only let 40 A go into one branch of the circuit? Anyway, I wasn't discussing your installation as told to you by your electrician, I was telling you the rules that are stated by Suruhanjaya Tenaga. You can follow or not, up to you. |
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stormer.lyn
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Mar 22 2025, 07:29 AM
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QUOTE(michaelangelo @ Mar 21 2025, 11:04 PM) I think I better ask another qualified electrician...thanks for the guidelines... You should definitely stop listening to your current "electrician" |
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