Search found 10 matches
- Tue Oct 17, 2023 8:14 pm
- Forum: Standards and Legislation
- Topic: Alternative to MEN in Mining operations - is it a part 1 solution?
- Replies: 2
- Views: 2314
Re: Alternative to MEN in Mining operations - is it a part 1 solution?
Hi Alec, Thanks for the reply. Yeah, it makes sense being Part 1. I suppose in practice its not so simple making the whole installation HRW due to being non-MEN, just for the fact that in mining the use of alternative earth system is common place and there are lots of additional standard to ensure s...
- Mon Oct 16, 2023 8:54 pm
- Forum: Standards and Legislation
- Topic: Alternative to MEN in Mining operations - is it a part 1 solution?
- Replies: 2
- Views: 2314
Alternative to MEN in Mining operations - is it a part 1 solution?
Hi Guys, I have a question WRT alternative supply system to MEN (TNCS), in mining operation we often use the IT earth system. To be specific the current mine site the 11KV used on site is supplied via Isolation transformer (5.5MVA), the secondary side has a resistor connected between the star point ...
- Wed May 19, 2021 11:05 am
- Forum: Inspection
- Topic: Buss tie changeover switch main switchboard
- Replies: 6
- Views: 6642
Re: Buss tie changeover switch main switchboard
Hey, Had this exact situation few months ago, but with three transformers, with three main switches, two bus ties between each "section" of the board all on to one switchboard. N + E bar common across all three boards, and it also had generator supply as well. Each incomer had a MEN link, meaning th...
- Sat May 15, 2021 7:11 pm
- Forum: Switchboards
- Topic: Meterbox as BTS
- Replies: 4
- Views: 5532
Re: Meterbox as BTS
Hey just out of curiosity what's the clause for the use of single insulated wiring? Trying to find it.
3000 3.10.1.1 Exceptions says single insulation is ok or is it 3012?
3000 3.10.1.1 Exceptions says single insulation is ok or is it 3012?
- Wed May 05, 2021 10:20 am
- Forum: Selection and Installation of Wiring Systems
- Topic: Old cable types
- Replies: 4
- Views: 11106
Re: Old cable types
Thanks Alec / Pete for the responses.
So same applies to VIR /TRS also as long as electrically safe?
However prudent to replace.
So same applies to VIR /TRS also as long as electrically safe?
However prudent to replace.
- Tue May 04, 2021 9:17 pm
- Forum: Selection and Installation of Wiring Systems
- Topic: Old cable types
- Replies: 4
- Views: 11106
Old cable types
Hey Team, Was just a job the other day a saw some oldish TPS which was solid core 2.5mm primary insulation on the earth as well, not bare earth in sheath. What date did the standards prevented the uses of solid core cable other than 1mm? Just want to get a better upstanding of when types of cable we...
- Fri Apr 30, 2021 10:02 am
- Forum: General Electrical Discussions
- Topic: VSD Cable - why multiple earths?
- Replies: 4
- Views: 7108
Re: VSD Cable - why multiple earths?
In a symmetrical earth design cable the earth conductors are located in the interces between the phase conductors. This ensures the distance between the phase conductors and earth is consistent. The resultant earth currents now cancel each other out minimizing the common mode current that can flow b...
- Thu Oct 01, 2020 7:59 pm
- Forum: Standards and Legislation
- Topic: Commissioning
- Replies: 1
- Views: 1721
Commissioning
Evening all, The question is mainly directed at the industrial side of the house. Currently working on a large industrial construction job. The plant is of foreign design and they have sent over a large commissioning team from that country. What are everyone's thoughts or feelings and the legality o...
- Mon May 25, 2020 11:52 pm
- Forum: Data, Alarms, Security, & TV Distribution
- Topic: ETP to OTP
- Replies: 4
- Views: 10385
ETP to OTP
What type of cable is everyone running between in a new build? Cat5e and fibre composite? Or are you just running duct? I have a long run in a new built to do, no access from etp to opt or data panel once lined. Bit of a mission running 20m of conduit through framing for chours too pull the cable, w...
- Tue Apr 21, 2020 3:57 pm
- Forum: Distribution, Networks & Metering
- Topic: Network electrical connection standards - Auckland
- Replies: 0
- Views: 7150
Network electrical connection standards - Auckland
Hi all, Just doing some personal development in this period of down time. I don’t have much experience in dealing with residential network connections and/ or power providers so bear with me if the following seem like stupid questions. I am in the Auckland area and was looking into the vector connec...