Archive for February, 2009
Circuit Standard
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Avaya Definity TN793CP 24-Analog Circuit Pack Standard $884.95 |
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High Voltage Devices and Circuits in Standard CMOS Tech $460.50 |
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TOSHIBA PESU1A CIRCUIT CARD EKT STANDARD PHONE CARD $375.00 |
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NEW High Voltage Devices and Circuits in Standard CM… $299.00 |
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Avaya Definity TN791 Analog Guest Line Circuit Standard $297.95 |
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High Voltage Devices and Circuits in Standard CMOS Tech $177.99 |
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Toshiba Strata DK280 RSTS1A 2-circuit Standard Interfac $165.00 |
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Toshiba Strata DK280 RSTS1A 2-circuit Standard Interfac $165.00 |
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EZ WIRING 12 CIRCUIT STANDARD PANEL WIRING HARNESS $160.00 |
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NEW circuit board 68-70 B Body NONRallye Standard Dash $154.99 |
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NEW circuit board 66-67 Dodge Coronet Standard Dash $149.99 |
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Mitel SX-2000 MC340BA LS/GS Trunk 8 Circuits Standard $147.95 |
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NEW circuit board 1966 Plymouth Valiant Standard Dash $144.99 |
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Inter-tel DX/MDX Circuit Card 440.2100 Standard $133.95 |
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Pro Circuit Standard 304 Silencer YZ250 2002 YAMAHA $99.99 |
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Pro Circuit Standard 304 Silencer RM250 Suzuki 04-08 $99.99 |
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Inter-tel DX/MDX Circuit Card 440.2200 Standard $99.95 |
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Avaya Definity TN762B Hybrid Line Circuit Card Standard $98.95 |
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Adaptive Multi-Standard RF Front-Ends (Analog Circuits $96.29 |
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Adaptive Multi-Standard RF Front-Ends (Analog Circuit.. $89.07 |
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PRO CIRCUIT WORKS STAND STANDARD $79.99 |
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New Standard Flow Parallel Circuit Manifold AD03P012S $74.99 |
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Toshiba DK RCOU1 Printed Circuit Board Standard $60.95 |
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249169 40A, Time Switch, 1 Circuit Standard On/Off $59.99 |
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SC-300 SNAP CIRCUITS STANDARD EDUCATIONAL KIT $59.00 |
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SC-300 SNAP CIRCUITS STANDARD EDUCATIONAL KIT $59.00 |
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THERMOCOUPLE RTD 12 CIRCUIT STANDARD 2-PIN JACK PANEL $39.95 |
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STANDARD TOGGLE CIRCUIT BREAKER, BY ANCOR # 552120,NEW $33.99 |
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Monster 4X4 World Circuit (standard edition) (Wii, … $30.95 |
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2000 pcs x 2.54mm Standard Circuit Board Jumper Cap $29.99 |
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1974 Data General Computer Circuit Board Standard 2P Print Ad An original vintage magazine ad print from the year published. Print ads make unique gift items that can be framed as artwork. Shipped flat un-framed in plastic sleeve with backing board…. |
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Krowne Metal Corporation Standard 1800 Series Drainboard/Ice Bin Station 7 Circuit – 48 x 18 1/2 Standard 1800 Series, Drainboard/Ice Bin Station, 48″x18-1/2″ OA., 4″ backsplash. 24″Wx8″dp 80-lb ice bin/right, 7 circuit CP, bottle racks, 1″ drain, 24″ drainboard/left, 1″ drain, s/s top & front beer bin|cold bin| Krowne 18-D48R-7 Cocktail Workstation Home… |
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Krowne Metal Corporation Standard 1800 Series Ice Bin 7 Circuit 15 Standard 1800 Series, Ice Bin, 36″ x 18-1/2″ OA, 15″ deep insulated chest, 4″ splash, 138-lbs. ice cap., 7-circuit cold plate, 1/2″ drain, (2) 3-pak remov. bottle racks, s/s top & front ice bin| Krowne 18-36DP-7 Free Standing Ice Bins Home… |
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Jacka Presents Conference Call $13.49 … |
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Connecticut Electric UBIZ250 Zinsco Circuit Breaker, 2-Pole 50-Amp Thick Series $52.99 Sold as each. 1-1/2″. 50 amp, 120/240 vac. Non-interchangeable. 10,000 AIR. Switch indicator. Plug-in. Fits Zinsco panels. Standard overload and short circuit protection in Zinsco load centers. ETL listed. HACR rated. Bulk. Manufacturer number: UBIZ250-B. SKU #: 3003225. Country of origin: China. Distributed by Connecticut Electric & Switch…. |
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Connecticut Electric UBIZ0240 Zinsco Circuit Breaker, 2-Pole 40-Amp Thin Series $50.00 Sold as one unit. (1 unit = each.) 3/4″. 40 amp, 120/240 vac. Non-interchangeable. 10,000 AIR. Switch indicator. Plug-in. Fits Zinsco panels. Standard overload and short circuit protection in Zinsco load centers. ETL listed. HACR rated. Bulk. Manufacturer number: UBIZ0240-B. SKU #: 3003274. Country of origin: China. Distributed by Connecticut Electric & Switch…. |
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Connecticut Electric UBIZ215 Zinsco Circuit Breaker, 2-Pole 15-Amp Thick Series $48.32 Sold as each. 1-1/2″. 15 amp, 120/240 vac. Non-interchangeable. 10,000 AIR. Switch indicator. Plug-in. Fits Zinsco panels. Standard overload and short circuit protection in Zinsco load centers. ETL listed. HACR rated. Bulk . Manufacturer number: UBIZ215-B. SKU #: 3003183. Country of origin: China. Distributed by Connecticut Electric & Switch…. |
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Puritan Bennett Adam Circuit Interface with Headgear, Each … |
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B&F Home Ventilator Circuits w/Exhalation Valve, Standard Connector – 15/case $170.99 Life Products/Aequitron for LP5, LP6, & LP10. 72″ main tube, manifold and exhalation valve assembly, 78″ airway pressure line, 78″ exhalation port line, 6″ flex tube, retainer clips, elbow with port inlet. Latex-free…. |
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Breathing Circuits & Accessories, Standard Bags – Breathing Bags – VetEquip – Model 921402 $35.27 The Bain non-rebreathing circuits are tube-within-a-tube circuits with the 2mm (1/16″) fresh gas tube inside the 6mm (1/4″) waste gas tube. The rodent non-rebreathing circuits are smaller than standard Bain circuits with a flared end that acts as an anesthesia nose cone. The Mapleson E non-rebreathing circuit has the 6mm (1/4″) fresh gas tube outside the waste gas tube. The complete dual procedure… |
In today’s printed circuit boards, copper is used especially for interconnecting the components on the substrate. Traditionally, copper is used as a material to form an electrical connectivity track pattern; whenever copper is exposed without proper coating and exposed to air over a long period of time, copper will be easily tarnish because of oxidation. It will then get corroded and thus loses its solderability. Because of this issue, multiple techniques are used to protect the copper tracks, via holes and printed through-holes (PTH). One of the methods is coated with organic coating, oxide coating and the plating method that many manufacturers used long time ago. PCB Organic coating, though simple in application, is not recommended for long term usage due to capability of PCB manufacturer process control in thickness, composition and also the curing cycles. It can also cause unpredictable deviation in solderability. However, with the enforcement of lead-free, it is widely use on consumer PCB now.
Oxide coating can protect the circuit from corrosion, however, it fails to preserve the PCB solderability. The most standard method since long time ago for PCB manufacturers is metal coating process which was standard practice to ensure solderability and protect the circuit from corrosion before the enforcement period of lead-free era. So it was a key factor and plays an important role in the PCB manufacturing of double-sided and multi-layer (PTH) boards in the past. In particular, plating a solderable metal over the tracks was a standard practice to afford solderable protection to the copper tracks. Also, the edge connectors added with spring contacts mating with suitably designed connector tabs on printed circuit boards, are used for the interconnection of various modules in electronic equipment. Such electrical contacts expected to have a high degree of wear resistance and low contact resistance. This will ensure precious metal plating on these contacts and the most commonly used metal is gold. Other metals used for coating are tinning of the tracks, nickel plating and in some instances, copper plating to build up some of the track areas.
About the Author:
Steven W has been writing articles for nearly 3 years. His research is in Printed Circuit Board. So come visit his website that discusses PCB Layout Services products and spin of prototype board such as Quick Turn PCB.
Article Source: ArticlesBase.com – Printed Circuit Board (PCB) Plating
How many duplex outlets are allowed on a 20A GFI kitchen circuit?
How many duplex outlets are allowed on each of the two 20A GFI kitchen countertop circuits? A standard 20A circuit allows 13 outlets, but this seems too many for kitchen appliances.
In the US, the outlet circuits will be 120V – a 20A branch circuit, therefor, maxs at 2400W, not 4000W. Code requires a minimum of two such circuits in a kitchen for small portable appliances. Allowing for 180W per receptical would permit up to 13 outlets on one branch. Deciding how many circuits to actually install and how to divide the outlets among them would require advance knowledge about how they will actually be used, which is impossible, from an electrician’s point of view.
If you have an open utility area (unfinished basement) under the kitchen, you could breakup wiring to short strings of outlets fed from accessible junction boxes. Feed the outlets with the two required circuits; if additional circuits are needed to meet actual use, the outlet strings can be easily broken up further with new circuit feeds to those junction boxes later on.