Monday, September 23, 2013

Plumbing --- Plumber Tape Teflon Tape for Thread seal



Ref [1] Family Handyman


Use two types of Teflon on threaded joints

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Connections that rely on threaded pipes and fittings are prone to leaks if they're not sealed with either Teflon tape or Teflon pipe joint compound. Careful plumbers use both on every joint for extra security. They don't want to come back.
Start by wrapping the male threads with Teflon tape (Photo 1). With the end of the threaded pipe facing you as shown, wrap the tape clockwise. Usually three layers is enough. Once in a while, you'll run into a loose fitting that requires four or five wraps. Stretch and tear the tape to complete the wrap.
Spread a thin layer of Teflon pipe joint compound over the tape (Photo 2). If you're working with plastic pipe, choose Teflon pipe joint compound that's compatible with it. Then start the threads by hand before tightening the connection with wrenches (Photo 3). Wipe away the excess.

Lubricate the ferrule on compression joints

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Compression joints are most common on shutoff valves, although you find them on other fittings as well. They have a brass or plastic ring (ferrule) that's compressed into a recess when you tighten the nut, forming a seal. Lubricating the pipe and the ferrule with a bit of Teflon pipe joint compound (Photo 1) helps the ferrule slide along the pipe and squeeze tightly into the recessed fitting with less wrench pressure (Photo 2). Tighten compression fittings firmly with two wrenches to crimp the ferrule onto the pipe (Photo 3). Also make sure the pipe or tube goes straight into the fitting. Misalignment will cause a leak. If the fitting leaks after you turn on the water, try tightening the nut an additional one-quarter turn. This usually stops the leak.

Align slip joints precisely for a tight seal

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Joints on chrome trap assemblies rely on rubber slip joint washers for the seal, which often leak. If you're reassembling a chrome trap, buy new slip joint washers and nuts. However, new washers sometimes stick to the pipe, causing them to twist or distort as you push them tight with the slip joint nut. To avoid this, lubricate the drain tubing and slip joint with a little pipe joint compound (Photo 1). The compound helps the washer slide smoothly and creates a tighter seal.
Start the slip joint nut by hand, and twist it on until the threads are engaged correctly. Hand-tighten all joints first (Photo 2). Then adjust the trap parts until they're aligned and pitched slightly for drainage. This is key; a misaligned joint will leak, even with new washers. Finally, use a large slip joint pliers to tighten the nuts an additional half turn.
Plastic trap parts use hard plastic slip joint washers for a seal. Make sure the flat part is against the nut with the tapered side facing the fitting.

Choose flexible supply tubes

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The skinny copper or chrome supply tubes used to connect faucets and toilets (Photo 1) are tricky to cut, bend and align. But you don't have to put up with them. When you're replacing a faucet or toilet, use flexible supply hoses with a braided covering instead (Photo 2). They have rubber gaskets at each end and don't require much force to seal. They're available in many lengths and are flexible enough to fit almost any configuration. The only trick is buying a connector with the correct size nuts on the ends. Take your old tubing and the nuts on each end along with you to the store to be sure of an exact match.
Start the nuts carefully and hand-tighten. Then tighten an additional half turn (Photo 2). Avoid overtightening. It's easy to tighten the nuts a little more if the joint leaks.

Electrical Wiring Colour


Ref [1]  http://www.accesscomms.com.au/reference/powerplug.htm
Ref [2] http://en.wikipedia.org/wiki/Electrical_wiring_in_the_United_Kingdom

According to [2]
Pre-1977 IEEPre-2004 IEECurrent IEC
Protective earth (PE)Color wire green.svgColor wire green yellow.svgColor wire green yellow.svg
Neutral (N)Color wire black.svgColor wire black.svgColor wire blue.svg
Single phase: Line (L)Color wire red.svgColor wire red.svgColor wire brown.svg
Three-phase: L1Color wire red.svgColor wire red.svgColor wire brown.svg
Three-phase: L2Color wire yellow.svgColor wire yellow.svgColor wire black.svg
Three-phase: L3Color wire blue.svgColor wire blue.svgColor wire grey.svg

According to [1]

Australian 3-Pin Electrical Mains Plug

The domestic mains power supply in Australia is 240V AC, 50Hz. Standard 3-pin earthed power outlets are rated at 10Amps and are usually switched. The 3-flat-pin plug is used in all states of Australia (including its external territories), New Zealand, Papua New Guinea and the Solomon Islands.  Although the configuration is similar to mains plugs used in mainland China, dimensional differences to the plug body may be incompatible with recessed cord socket and prevent Chinese-compliant CPCS/CCC (CCEE) plugs from being legally sold/used in Australia.  Argentina also uses a similar 3-flat-pin configuration as Australia, but with slight dimensional differences and with the active and neutral wires being reversed. These important differences prevent the Argentina-compliant IRAM plugs from being legally sold/used in Australia as incorrect polarity may present an electrical safety hazard.
The Australian mains plug configuration was originally presented as provisional standard C112 in 1937, formalised as Standard C112 in 1938, redesignated AS3112 in 1981 and harmonized with the New Zealand standard and redesignated AS/NZS3112 in 1993.  Australian Standards AS/NZS 3112:2000 and AS/NZS3112:2004 for Australian Mains Plugs now define the requirements for theinsulation of the Active and Neutral pins of the plug.  15Amp and 20Ampconfigurations of the mains plug and outlet are also defined by the standard.
The following diagram shows the Australian plug wiring configuration.
australian 3 pin wall socket for 240 volt ac power distribution Australian 3 Pin Mains Plug 240V AC
The diagrams below show wiring for an Australian 240V mains cord plug and socket. Note the "reversal" of the Active and Neutral wires depending on whether you are wiring a socket or a plug.
Australian 240V mains socket wiring Australian 240V mains power plug wiring

Standard wire colors are:

MarkingFlex conductor colorsBuilding wire conductor colors
ActiveABrownRed
NeutralNBlueBlack
EarthEGreen/YellowGreen/Yellow

Older flex and premises wiring will use the following colors:

MarkingFlex conductor colorsBuilding wire conductor colors
ActiveARedRed
NeutralNBlackBlack
EarthEGreenGreen
Check out our extensive range of Power cords, AC adaptorsIn-line switch mode power supply units and Power components from our on-line catalog.

Thursday, September 12, 2013

Which 3G Networks offer public IPs?



Reference:
[1] http://forums.whirlpool.net.au/archive/1501815


We need an unofficial list of our 3G ISP specs given their differences and it's not practical for anyone to have to buy and try dongles/SIMs from each network (both pre & post paid) just to try.

While all will allow web browsing & email, beyond that seems cloaked in secrecy.

Many networks are actually private networks, behind a NAT, without a publicly accessible IP (either dynamic or static) preventing many common functions such as remote control (of routers and PCs), IP cameras, VPNs & servers. Presumably there aren't enough public IP addresses to go round but at least there should be mechanisms such as port forwarding. Or other options?

Telstra 3G (post paid) is private (& I would assume also prepaid) but I'm advised Bigpond offers public IPs – except I'd need to sign up to a contract just to try!! I'm aware Virgin Broadband at Home (post paid) is public (via Optus 3G) but suspect Virgin prepaid is private. I have No Further Information (NFI) on Optus, 3/Vodafone or others (if different from their host such as Bigpond & Telstra on NextG).

=============at 2010-Aug-2, 1:38 pm===============
Exetel – external, fixed IP
Beagle – external dynamic IP, optionally fixed IP.
Optus – external dynamic IP
Telstra Prepaid – Private network behind NAT
Vodafone – mostly external dynamic IP (but not always – hard to figure out why)

Virgin prepaid is public (VirginInternet APN)

Internode only offer public, with optional static

Telstra BigPond is public

Telstra 3G internet is only private for the usual default APN's:
telstra.internet
telstra.wap
telstra.iph

However if you're a Telstra business mobile account holder you can request the "GPTEXB3" code to be activated on your account to allow access to the "telstra.extranet" APN.
When telstra.extranet is used (billed with the same data allowances as telstra.internet) you will be allocated a public dynamic IP in the 123.209.x.x IP range. If you keep your device active you'll have the same IP for days or weeks at a time so it's almost static!

Monday, September 9, 2013

TPG IPTV over Wireless with Netcomm N150/NB14WN






http://www.youtube.com/watch?v=aZYrOsW3gEo&noredirect=1

I was able to set my desktop up the way you see because I am using Linux (Ubuntu 10.04). The desktop is Gnome 2.30. The dock is Cairo dock. The transparent panel is conky. If you are running Ubuntu let me know and I will point you to the relevant links to install and configure the other stuff.