Friday, April 14, 2017

Residential Hot Tub Electrical

Image result for hot tub photo

Clients that just have to have that hot tub usually do not take into consideration usually the amount of electrical power that it takes to operate on a daily basis even if it is not used daily. Typically factory specifications call for most residential hot tubs that are grid tied to be single phase 120 240 VOLT 50 AMP GFCI circurit breaker protection. (wattage/voltage=amperage)  How to figure the wattage (amperageXvoltage=wattage) 50 X 240 = 12,000

Most older residential MAIN BREAKER grid tied utility metering is only single phase 120 240 VOLT 100 AMP if you are lucky and the original electrical panel is usually loaded with no room for additional circurit breakers.

Residential clients that are already operating 240 VOLT loads like water heaters, cook stove, HVAC
and similar on their existing original 100 AMP electrical grid tied panel do not realize that by adding the hot tub spa will overload the existing grid tied metering & panel electrical service. One safety consideration is that hot tubs are rated at contine use of 3 hours or more for heating and pumping useage rated not like HVAC loads that are rated at under 3 hours and are rated intermittent.

The only quality grid tied fix is a upgrade to the grid tied electrical weatherhead cables. metering and MAIN BREAKER panel by doubling to 200 amps or even 300 to 400 amp residential. The answer to the problem is to add any clients total onsite wattage requirements and design a system that will peak to 80% of capacity leaving 20% in reserve for motor and compressors surges. The goal is to see less flicking in lighting and smoother starting for all residential loads.

Usually at this point the client goes with a low ball bidder and you are out travel, time and sharing of quality knowledge of how to get er done and safety is thrown out the window with those lowball bidders or the quality of the installed materials is less than half or more of what a quality material installation would be. Needless to say do it right the 1st time as people's lives are at stake and safety should be always followed concerning water and electrical power.

But for those that indeed consider quality and realize that the NEC (National Electric Code) is just the BARE minimum allowed with craftsmanship and materials and that you can never go below the bare minimum standards but you can always go above current code with quality craftsmanship and materials. It comes down to luxury and how much control you want over any electrical appliance including hot tubs. Having total control with smartphone is the order of the day and ringing up the newer spa's to set a certain temperature and jet flows along with covers that can be raised or lowered gets the job done with style.

D B Electric


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Wednesday, February 22, 2017

It all started out with a client wanting 1 ceiling fan removed and a 1 new light hung in it's replacement reusing original wiring.

After discovering that the original ceiling fan was unswitched meant that a problem had risen and a solution was to be discovered by troubleshooting methods. Traced the wiring voltage back to the main breaker panel and a 120 volt 20 amp circurit breaker marked Garage . The plot thickens as the wiring in the box at the ceiling fan opening is only 14 2 NMB spliced solid to stranded for unknown reason? This meaning the 142 NMB wiring was over loaded, the plot thickens.

Having killed electrical power to the circurit breaker a tone generator was placed on the original wiring at the ceiling fan removal location. The path that this 14 2 NMB spliced solid to stranded for unknown reason was traced out and terminated in a octagon metal junction box on the garage area.
The wiring from the circurit breaker is 12 2 NMB and is run thru this conduit. Also the power to feed the 14 2 NMB ceiling fan is tapped off this junction and another 12 2 NMB is stubbed down from the attic into this junction? 

Solution remove 14 2 NMB from junction box in garage to ceiling fan removal locations and refeed with new 14 2 NMB wiring from old fan opening and switched interiour light by front door making both lights come on together off the original switch and wiring. 

Rehang 2 new LED 19.1fixtures that can be dimmable 

From A to Z  D B Electric has you covered with quality craftsmanship and services.


Sunday, February 19, 2017

Electrical Energy Power Voltage & Wattage Loads

Whether grid tied or off grid electrical alternative energy power AC voltage both take wattage to operate AC electrical devices like lights, outlet loads, pumps and everything inbetween!

Grid tied relies on the Main Breaker or Fuse, load side meter design amperage rating. 
Off grid relies on system design to match onsite electrical energy daily wattage usage.

AC electrical energy power voltage has many theories from the very start of its invention.

An example of this is that by raising voltage lowers amperage for the very same wattage being operated, the formula is wattage/voltage=amperage & voltage X amperage=wattage.  A standard grid tied secondary that is 200 amp 120 240 voltage single phase residential line drop is 48,000 watts controlled by Main Breaker and billed by utility meter.  This same grid tied 48,000 wattage load is only 6.67 amps on primary Line Side 7200 volts and then transformed down to secondary.

Off grid alternative electrical energy power voltage can greatly benefit from the history of  AC electrical power by mixing and matching the numbers. The same off the shelf grid quality utility transformers are available for wind and solar switching PLC SCADA for grid tied or remote onsite system designs. Needless to say this has angered some utilities and they do not allow Primary or Secondary Net Metering into their utility grids. The next step than is NET ZERO it is very easy to legally stop a grid tied utility meter from spinning for days or weeks at a time before any battery bank or banking charging maybe required.

Today's grid quality off the shelf  DC to AC inverters are so fast on switching from one voltage source to another voltage source that clock or computer resets are not necessary.

The same principles apply to AC transformers whether grid tied or off grid alternative electrical energy as long as the quality of the voltage is designed to be matched.
Image result for photo of generator
An example if a grid tied service drop was back feeded by an onsite 120 240 volt generator  it would charge the transformer to 7200 volts if there was no grid tied voltage present. If the secondary line was energised by utility voltage it would blow the generator up and possibly cause a fire. Not good ideas as it could also kill a linesman or oneself if improperly designed and operated. This is why ATS (automatic transfer switch) protects and switches various voltages from one another.  ATS is no more than a contactor based system that can be either normally open or normally closed once again it is in system design.
By taking grid quality off the shelf vendor products from various vendors worldwide makes it possible to have grid quality electrical energy even out in the middle of nowhere and the options are endless for wattage and voltage requirements in single or three phase options. 

By mixing solar and wind and any alternative energy a microgrid is formed and the options are endless as everyone's needs differ from their onsite wattage load requirements. D B Electric solution is to custom tailored each individual onsite usage demands and built in stages as funding permits. Bottom line alternative electrical energy is an investment that pays for itself and system design makes it safe, reliable and efficient. 

D B Electric consults clients on grid tied and off grid alternative electrical energy. Pre Built and onsite quality craftsmanship and services options A to Z.