garage door cable length calculator
Garage Door Opener Costs Installing a garage door opener will save you the inconvenience of leaving your car to operate the door.You will find that the cost to install an average garage door opener depends on the door size, accessories, quality of finish, and labor rate.In the following tables the Labor Cost figures are what the able DIY person should expect to save by performing the complete installation.Garage door opener: economy special price single-door opener with remote.ItemUnit CostDoor opener: 1/2 HP chain drive; 2 lamps (bulbs not included).$152each1$152Circuit upgrade: 25' of surface mounted cable; screws and miscellaneous.$87each1$87Equipment and Material Cost$239each1$239+ Labor Cost (mount)$40per hour2$80+ Labor Cost (electrical)$43per hour1.5$65Total Cost$384$384Garage door opener: deluxe double door opener; backup battery, smartphone ready, with remotes.ItemUnit CostDoor opener: 1.25 HP belt drive; 2 lamps (bulbs not included)$275each1$275Circuit upgrade: 25' of surface mounted cable;
screws and miscellaneous.$87each1$87Equipment and Material Cost$362each1$362+ Labor Cost (mount)$40per hour2$80+ Labor Cost (electrical)$43per hour1.5$65Total Cost$507$507Other considerations and costsTaxes and permit fees are not included.DIY considerationsThe work may be suitable for DIY.The opener is ceiling mounted requiring a drill and anchors and the skills to use them.The work may be atop ladders or scaffold that will increase the price and safety risk.ReferencesCraftsman Estimator Costbook, complete series year 2015.Latest prices found on Home Depot and other vendor Web sites.Literature review of DIY Web sites. Cost to install a garage door opener in my city Cost to install a garage door opener varies greatly by region. To get free estimates from local contractors, please indicate yours. While we recommend contacting your local LiftMaster Dealer to replace any parts, you can order them directly from this site. Just enter a model number or keywords below to get started.
You are hereHome » Resources » Calculation Tools » Heating calculatorT-Spec wires and hardware ensure full current flow for your amplifier In order to operate correctly, an amplifier needs its power and ground wiring to be large enough to accommodate its demand for electrical current. What wire gauge (thickness) to use for power cabling depends on how much current your system will try to consume, and on how long the wiring run will be. Understanding the needs of your system can help you know when to choose 4-gauge wire instead of 8-gauge wire. Do a little bit of math and then consult our wire size chart below. Of course, if you're looking for a new car amplifier, we list the recommended amp wiring kit with each amp. To determine the approximate current draw (in amperes) of your amplifier, you must first calculate the total power of the system (multiply the number of channels by the number of RMS watts per channel). If you have multiple amps, add up the total power figures to arrive at a grand total.
Cross-reference these two figures in the chart to determine which gauge of cable you need.
garage door prices surrey bc Please note that the smaller the gauge number, the larger the wire.
patio doors for sale edinburgh1/0 ("one-aught") is the common name for a 0-gauge wire; 2/0 ("two-aught") for a 00-gauge wire. Here is an explanation about the formula we use, in case you want more details. Calculating the amplifier's total power is straightforward, but the other two parts can be confusing. First of all, why do we double the total power figure? That's because the typical analog amplifier is about 50% efficient. That means about half of the power it generates is turned into audio output while the other half of the power is lost as heat. So if your amplifier is putting out 400 watts, it's actually drawing about 800 watts of power from its source, and the amp's wiring needs to be big enough to handle that draw.
(Class D amplifiers are much more efficient in comparison, but it's still safest to go with the larger wire size.)Yes, vehicles have a 12-volt electrical system, but we're assuming that the vehicle is running — which means its alternator will bump up the system voltage to about 13.8 volts. This is a better real-world representation of the vehicle's electrical supply. Dividing by 12 results in a larger number, which could point to a larger wire gauge, but it's often in the same color range in the chart. Manufacturers use 14.4 volts, when they spec their gear, to exaggerate their power ratings. The reason different cable lengths bear different ratings is because the electrical resistance, inherent in all wire, builds up as the cable gets longer, until it forces the voltage to drop below a useable level. At that point, up-sizing the power cable will restore the voltage to its intended level. Finally, according to our tech support guys, the primary performance limitation in most amplifier installations is in the current delivery — either a weak ground or insufficient wire gauge.
Installing too small of a wire gauge results in poor performance, potentially shorter service life of connected components (your amplifier and speakers), and a potential safety hazard. On the other hand, installing too large a wire gauge doesn't really have any downside, and there is the potential for better performance. Obviously, there's no need to buy 2-gauge wiring when 10-gauge will do. That kind of overkill would be a waste of money. But if the chart could lean either way between two sizes, going with the larger wire size would be the smart choice. Speaker wiring matters too. The signal and power coming out of your amplifier must not be impeded on their way to your speakers and subs. When you replace or run new speaker wiring, we recommend using 18-, 16-, or 14-gauge wires for speakers and 16-, 14-, or 12-gauge wires for subwoofers. Now that you have some idea of how much amp wiring you need, shop our selection of amplifier wiring and accessories. We have amp wiring kits, distribution blocks, and everything else you need.