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This is my understanding of the basic difference between European systems and North American systems. Europeans use 230 volts 50Hz electrical circuits that comprise of one ungrounded current-carrying conductor and one grounded current-carrying conductor, thus would use single-pole circuit...

Europeans use 230volts 50Hz electrical circuits that comprise of one ungrounded current-carrying conductor and one grounded current-carrying conductor, thus would use single-pole circuit breakers for their circuit breakers. The vast majority of residents living in North America are supplied with...

The problem that I foresee you may run into with an electrical inspector would be Article 210.6 of the NEC code. Luminaires exceeding 120 volts nominal are not permitted in dwelling units. Perhaps you should wait until after your house remodeling is done to start your grow room construction for...

I'm not an electrician either, but I definitely know that there is a difference between a residential single phase service (often referred to as 120/240 volts split-phase) and a commercial dwelling three phase service (as shown in your photo) that could either be a 208/120 volts wye service or...

Not sure what you are suggesting, because you stated in another thread that you are an electrician from the United Kingdom. I have read on the web about people in the U.K. adding a spur circuit to an existing ring circuit, however, it is also my understanding that ring circuits are commonly...

We need to be supplied with a few basic information first. What is the NEMA configuration of your 240 volts wall outlet? And are you planning on having both lights on the same timing schedule?

Yes and they are probably capable of drawing at least 130 watts @ 120 volts to achieve those kind of airflow like the Vortex or Hurricane brand name in North America. And are loud too. Yes and they are probably capable of drawing at least 90 watts @ 120 volts to achieve those kind of airflow...

First off I have no experience with grow spaces that small to recommend what kind of fan to use, both in size and in power draw capacity in wattage. 18 watts for the 4" fan and 35 watts for the 6" fan tells me that the motor in those fans are incapable of achieving their advertise air flow...

You also made it clear that there was also a substantial difference in the wattage. Wattage is also a measurement of the amount of work a motor is capable of doing. The performance of a fan is defined as the amount of airflow in cfm at a given static pressure. Static pressure resistance caused...

It is often said in many trades that "one should use the correct tool for the job". This rule also apply when selecting the correct relay or contactor to use for HID lighting. It is my understanding that lighting ballasts are generally considered to be inductive loads and thus will require a...

Edit: After searching the web this weekend it is my understanding that the cool down time required after a power interruption to prevent hot re-strike is between 2 to 5 minutes for HPS bulbs (recent technology has now improve the re-strike time to 1 minute for HPS bulbs), and between 10 to 20...

@JMichael, you stated "I ordered the components and intend to build my own adjustable delay circuit". You care to share with us in detail what components you plan to use? The answer to your question is ...warnings about hot restrike does applies to both MH and HPS.

Both the Titan Controls Hades 1 and the C.A.P. HLC-2e offers 15 minutes delay on-time. For a few dollars more the C.A.P. HLC-3e has both high temperature shut-off and 15 minutes delay on-time. For 120 volts use only. I have not use either brand and therefore can not speak of their quality...

Although widely used, controllers like the one you mention do not properly protect 15A cords & devices connected to them. By purchasing a 6-Space Main Lug Load Center at Home Depot (priced between $20 - $30), and three 15 amp double-pole circuit breakers (purchased separately), and a couple of...

Easy enough for you, and your fellow Australians and New Zealanders to say, considering the fact that the manufacturer engineered those lighting controllers for use on your 230volts 50Hz electrical circuits that comprise of one ungrounded current-carrying conductor and one grounded...

Wow.. I didn't know that there was that much of a popular trend going on in the RIU forums to run multiple 1k lighting ballasts from just the wall receptacles. What are you guys using as a means to time the on/off cycle during flowering? I was under the impression that using a plug-in wall timer...

It is not necessary to go to the extreme of investing in a kill-a-watt meter. I am confident that you will be drawing under 40 amps. The issue I am more concern about is when the ampere load is exceeding 80% of the allowable ampacity of a given wire size, heat is generated in the wire and at the...

Please note in your illustration in post #24 above "To 240V 50 AMP 3+G Power Source". The circuit breaker should not be sized to more than the allowable ampacity of the wire. It appears to me that your electrician is using the CEC (Canadian Electrical Code) wire ampacities chart. I was citing...

Curious as to why you believe that the Sentinel GPS HPLC-8T has "built in circuit breaker" as I have never seen any reference on the web stating that it has built in overcurrent protection. The Orange 10 AWG may be capable of handling eight 600 watts lighting ballasts, but if your intentions is...

Saying "neutral off the pole is just another ground" is not taking into consideration that the neutral is carrying the unbalance current to and from the center-tap of the transformer. Saying "no power run through the neutral wire" when spoken out of context is a false statement. Saying "the bare...