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Older Activity
01-Jun-24,
03:30 PM
Isetech
started a thread
Solar panel design
in
Electrical Contracting Industry Forum
I am busy with a 12 kw 3 phase Sunsynk inverter Looking at the solar panel calculations, there seems to be a lot of confusion when it comes to...
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8 replies | 326 view(s)
27-May-24,
05:14 PM
Derlyn
started a thread
Server too busy
in
Administrative issues
Been getting this quite often the last month or so. Anything to worry about ?
see more
3 replies | 456 view(s)
Today,
03:17 AM
Derlyn
started a thread
Connecting batteries in parrallel.
in
Energy and Resource Conservation Forum
I'm struggling to understand why, when connecting parrallel batteries, the positive to the inverter is taken from battery 1 and the negative from...
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4 replies | 114 view(s)
Today,
12:04 PM
Derlyn
started a thread
Light switch.
in
Electrical Contracting Industry Forum
Presently there are 3 rows of 5ft fluorescents each on their own 15A breaker. The lights are turned off at the circuit breakers in the DB. They...
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5 replies | 96 view(s)
28-May-24,
09:30 AM
Dennis28
started a thread [Question]
Good Morning
in
Electrical Contracting Industry Forum
we were asked to do COC for an installation built 1960s so there is no earth conductors only the steel conduit that serves as earthing system. now...
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2 replies | 467 view(s)
27-May-24,
04:11 PM
adrianb@servatech.co.za
started a thread [Question]
Sage One
in
Accounting Forum
Any developers who can develop code to import lines into a Sage One invoice from a csv spreadsheet as a paid job?
see more
1 replies | 434 view(s)
31-May-24,
06:06 AM
Isetech
started a thread
How to grow a small electrical business
in
Electrical Contracting Industry Forum
I talk from my own experience, I have the TEE shirts to prove it, lots of them. Anyone who has been around for more than 30 years, I salute you.,...
see more
3 replies | 307 view(s)
31-May-24,
12:29 PM
Gtfast
started a thread
Calculate for full load conditions
in
Electrical Contracting Industry Forum
Good day As per the below reg what calculation is the calculation for full load conditions. I know we used 50 percent of circuit load in older...
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2 replies | 235 view(s)
28-May-24,
10:12 PM
Sansee
started a thread
Installation rules scope
in
Electrical Contracting Industry Forum
Good Day Guys I am currently studying for installation rules p1 and p2. Please can I be assisted with the regulations that need be studied within...
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1 replies | 317 view(s)
01-Jun-24,
09:39 AM
Isetech
started a thread
Home networks
in
Technology Forum
We have evolved over time and reached a point where an old ADSL line just doesn't cut it anymore, so we upgrade to a 20meg fibre line, have a TV...
see more
3 replies | 154 view(s)
30-May-24,
03:18 PM
Isetech
started a thread
The most expensive mistake you have ever made
in
General Chat Forum
This would be an interesting thread........we all know getting married, divorced and having children, or getting conned by insurance brokers, lets...
see more
0 replies | 219 view(s)
Today,
01:38 PM
Dylboy
replied to a thread
Light switch.
in
Electrical Contracting Industry Forum
Can do a contactor for each but as they the same phase then I am 99% sure ok to have the feeds into a light switch, will try find the regs if...
see more
5 replies | 96 view(s)
Today,
01:36 PM
Derlyn
replied to a thread
Light switch.
in
Electrical Contracting Industry Forum
Thanks. A contactor is not an option because they still need to switch the 3 rows of lights each on and off independantly. There are 3 circuit...
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5 replies | 96 view(s)
Today,
01:11 PM
Dylboy
replied to a thread
Light switch.
in
Electrical Contracting Industry Forum
Good idea for the contractors. As far as I know you can have 3 power supplies to the switch however they have to be the same phase.. you may be...
see more
5 replies | 96 view(s)
Today,
12:38 PM
Isetech
replied to a thread
Light switch.
in
Electrical Contracting Industry Forum
If you want 3 switches, just fit 3 din contactors in the DB and run 4 wires to the 3 lever switch, that way you only have 1 phase controlling the...
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5 replies | 96 view(s)
Today,
12:36 PM
Isetech
replied to a thread
Light switch.
in
Electrical Contracting Industry Forum
We fit a din mount contactor in the DB and run the switch wire (relay coil) to a surface 4x2 box with a single lever switch.
see more
5 replies | 96 view(s)
Today,
12:33 PM
Isetech
replied to a thread
Connecting batteries in parrallel.
in
Energy and Resource Conservation Forum
I connect the batteries in parallel cascade, so that I only need one DC battery disconnect. I am busy with a 3 phase inverter, with 3 batteries...
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4 replies | 114 view(s)
Today,
08:38 AM
Derlyn
replied to a thread
Connecting batteries in parrallel.
in
Energy and Resource Conservation Forum
Thank you, gentlemen. Much appreciated 👍 Got some changes to go and attend to on an installation 😉
see more
4 replies | 114 view(s)
Today,
08:30 AM
Justloadit
replied to a thread
Connecting batteries in parrallel.
in
Energy and Resource Conservation Forum
Another point to note that I follow, I keep all the battery wires the same length. This ensures that the current is balanced to all batteries. I...
see more
4 replies | 114 view(s)
Today,
07:14 AM
GCE
replied to a thread
Connecting batteries in parrallel.
in
Energy and Resource Conservation Forum
When you take both leads from one battery the current/power tends to come from the first battery and then it looks at the rest , so you tend to use...
see more
4 replies | 114 view(s)
Today,
07:05 AM
GCE
replied to a thread
RCBOs?
in
Electrical Contracting Industry Forum
We have found the Onesto 20Amp OL protect easily available
see more
34 replies | 33303 view(s)
Yesterday,
05:17 PM
AndyD
replied to a thread
RCBOs?
in
Electrical Contracting Industry Forum
Just thought this thread was worth a bump. I recently did an installation that required a couple of 20A / 30mA RCBO's which I got from RS Components....
see more
34 replies | 33303 view(s)
Yesterday,
10:36 AM
Isetech
replied to a thread
Solar panel design
in
Electrical Contracting Industry Forum
Lets look at an 8 kw inverter with 545 watt panels, this the most common setup we install. Inverter PV data: Max power - 10400W PV input...
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8 replies | 326 view(s)
Yesterday,
09:41 AM
Isetech
replied to a thread
Solar panel design
in
Electrical Contracting Industry Forum
Now we move onto the current rating, Inverter specs: PV input current - 26Adc + 13Adc Max PV Isc - 34Adc +17Adc looking at the STC...
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8 replies | 326 view(s)
Yesterday,
09:29 AM
Isetech
replied to a thread
Solar panel design
in
Electrical Contracting Industry Forum
Now we know how many panels we are going to install we need to look at the max PV input power As per the specs MAX PV input power = 15600W ...
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8 replies | 326 view(s)
Yesterday,
09:08 AM
Isetech
replied to a thread
Solar panel design
in
Electrical Contracting Industry Forum
To be on the safe side I am going to rather go with the panel STC parameters and the MPPT values. I going to use the mid range 550 Vdc and ...
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8 replies | 326 view(s)
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