Electrical Standers

HI every one, can any one help me to search about pdf files in iec and ieee standers while i get a acount on the both sites but i couldnot get me required information,

regards

Solar Hot Water Pool

Swimming pool ,inground.I just put 200 feet of 1 1/2 Pvc pipe on the roof and painted it Flat Black.got a small pump that pumps 320 gal per hour. I have the suction pipe going down about 14 inches and the return about the same. They are about 12 inches apart, and stuck on 2 thermomiters the kind y

Air line design

Dear,

We are planning to put 130 CFM air compressor to give air at 7 bar pressure. We will have 22 user point from main header (10 on ground floor and 12 on basement ). Now we require help to design our main header and pipe line layout for the system.

Thanks

How to Select Indoor Outdoor Joint Kit

Dear,

We have 11000 volt supply for 200 kva transformer. Now we are planning to change transformer with 750 KVA. But we are not going to change our HT cable which is 3 Core 50 sqmm XLPE cable.

I want to know that if we are required to change Outdoor kit of cable for fixing it with

Displacer Type Level Transmitter

I am in the process of selecting a displacer type transmitter. My vessel Total Inner dia is 1560 mm. Please tell me what should be the length of the displacer i should select to measure the level in this tank. Please tell me, it would be enough If I measure vessel level from 15% to 95%. PLEASE HELP

Quick Gate Question

Hello all,

I have a quick question from the other side of the world (New Zealand). Please bear with me as I am a Chemist not a engineer.

My Partner and I are building a driveway gate and arguing over details.

It is a simple picket gate with a brace a bit like this.

Injection Moulder Circuit Diagrams

Hi Guys, I have a Kaguchi injection moulder, Model No. KM 100b which won't run. There is a power supply board that supplies various voltages into a motherboard, into which are plugged, 4 circuit boards. I have removed the Power board, and the voltages I obtained on the power board are, 5.1 volts, 17

Potential Divider

I have 220v, I want to use 12vDC through potential divider to oprate a 12 volt relay which coil current is 300ma please help me to calculate the required Resistor and his wattage, I mean what will be the wattage of the Resistor and proper value.

best regard to my friends of CR 4

Beautiful Volcano Photography

From Boing Boing:

What's better than a volcano? A volcano with the Northern Lights behind it. Photographer Albert Jakobsson took this awesome shot of Iceland's Eyjafjajokull (gesundheit) volcano. In the full series of photos, you can see Icelanders entertaining themselves by han

Fossils Offer 'Window' into Human Evolution

From USATODAY.com Tech - Top Stories:

The discovery of a fossil pair in South Africa, reported by researchers Thursday, promises insights into early human origins about 1.95 million years ago. In two papers published in the journal Science, a team led by paleontologist Lee Berge