Grow room Electrical Safety Guidelines

kingofqueen

Well-Known Member
Welcome all ! Electrical safety is an subject area that often gets overlooked. With so many new growers I think there is some need for concern in this area . I,m an 16 yr electrician and am going to share my knowledge from being on construction sites for 16 yrs to compile this article to keep our grows and homes safe !


The Basics
First off most home circuits are 15 amps. And the average voltage is 115 volts .Which equals 1,725 watts. BUT that is the maximum . You will be safe using 80% of this which is 12 amps or 1,380 watts.
So what you want to do is make a list of every electrical item in your grow. Then add up the total wattage to see where your at . If amperage is given and not wattage you have to multiply the amperage by the voltage so 1.2 amps is 138 watts at 115 volts .
Volts x amps = watts
So with this information you should be able to get an idea of where you stand in total load on your grow per the circuit your using . Its also a good idea to be sure nothing else is on the circuit u use. If there is u have to add this in your calculation .

#1 Issue Heat from Ballasts

Your lighting ballasts generate a lot of heat . The hotter they get the less efficient they are whether its digital,electronic,or magnetic . Care should be taken to locate your ballasts in an area that gets some airflow usally outside the room so that the heat doesnt collect in your grow enclosure.

#2 Issue Cords

Care should be taken when using extension cords . Always use cord rated for the correct amperage according to your breaker. Always use 15 a cords . All cords should be checked daily as part of your PM. Check for nicks cuts and always check plug in connections . Loose cord connections start to generate extra heat and can eventually melt , or catch fire if left unnoticed !
It is equally important to check any wiring connections made . Meaning items you wired yourself . Be sure all connection are tight and not heating up . Make sure no wiring or cords are in contact with a heat source .

#3 Issue Excessive Heat from HID Lighting

Care should be taken to be sure nothing flammable is in contact or near your bulb . A good safety
measure to be taken here if you can afford it is an high temp shutoff for your light . If the temp reaches a predetermined level it shuts your light down as an safety measure . Another good measure to take is at least at the bare minimum keep a fire extinguisher near your grow.

Happy and Safe Growing to All !
 

Whodoo

Active Member
All Very good suggestions. Thanks. Especially about the extension cords. I would add - never roll up extension cords and leave them that way while in use - they could melt. I don't think I would be happy with a circuit I was using at a rate more 2/3 of it's amp rating either.

I have to rewire my panel to alter a 220V 50A stove breaker circuit, and run wire and stuff to get 120V with enough ampacity (izzat a word?) at my room. I've never done anything like that before. It should be fun.
 

NewClosetGrower

Well-Known Member
awesome thread bro..i am a journeyman (licensed in commerical) electrician..so if you guys have ANY questions feel free to ask...wiring, overloading circuits, or anything of the sort...im more then willing to help
 
I am a newbie when it comes to electrical stuff. What should one do if their equipment is reaching the max, or going over 15 amps? I hope this doesn't sound like a stupid question, is it 15 amps for each outlet? When you say home circuit what does that mean exactly?
 

kingofqueen

Well-Known Member
House circuits for general usage are 15 amps . No it doesn't mean you can load it up to 15 amps , to be safe you go 80% of that which is 12 amps . If your loaded up to 15 amps now you should adding another circuit .
 

NewClosetGrower

Well-Known Member
I have a master lighting controller running 240v, is a 50amp breaker to big for a 4k set-up?
im not sure what you mean by a 4k set up, sorry man...but as long as it doesnt run at 50 amps, or 80% of 50 amps if its a "continuous load" then you dont have to worry about getting a breaker to big...bigger the better
 

NewClosetGrower

Well-Known Member
I am a newbie when it comes to electrical stuff. What should one do if their equipment is reaching the max, or going over 15 amps? I hope this doesn't sound like a stupid question, is it 15 amps for each outlet? When you say home circuit what does that mean exactly?
if your getting to 80% of the 15amp circuit then you need to find another circuit or add another one like kingofqueen said..."home circuit" is a group of plugs and lights in your house that are connected to a circuit, the breakers in your panel that you flip, there are several of them in your house (each breaker in your panel is a circuit)...so when you have a 15 amp circuit and the things plugged into in are on for more then 2 hours its called a "continuous load" which means your not supposed to go over 80& of that circuit (breaker) size for safety reasons...so if your getting close to it, or you leave your lights on for a long time and the breaker trips, you need to add another circuit or find a new plug..if you have attic access close by and some basic tools i can walk you through how to get another plug where you need it off a diffrent circuit for about 20 bucks in material
 

SlimDigital

Active Member
Wow great info. I had issues in my previous place where i would always trip the power. I know very litte regarding eletricity. I was running a veg and flower set uo in 1 room. 1 600w light and ballast, 1 4in exhaust and a few air pumps for flower and anyhwere between 8 and 12 43w cfl's. Now I understand the need to space out the load! Blew out my damn 42in flat screen from not having a surge protector :(
 

CypressRyan

Well-Known Member
im not sure what you mean by a 4k set up, sorry man...but as long as it doesnt run at 50 amps, or 80% of 50 amps if its a "continuous load" then you dont have to worry about getting a breaker to big...bigger the better
I have 4 1000 watt lamps attached to this master controller, I have that wired to the main panel with 8 gauge outdoor-rated, stranded wire with a 50 amp breaker protecting it. Is the 50 amp to much as I still want to have the voltage protection close to the actual amps used. get my question?
 

NewClosetGrower

Well-Known Member
I have 4 1000 watt lamps attached to this master controller, I have that wired to the main panel with 8 gauge outdoor-rated, stranded wire with a 50 amp breaker protecting it. Is the 50 amp to much as I still want to have the voltage protection close to the actual amps used. get my question?
yeah i get ya man...the way you figure the amps out is simple, you divide the Watts by the Volts. So 4000W/240V=16.6A...so then take 80% percent of that 50amp breaker because of the continuous load and you get 40. So basically your running 17 amps on a 40 amp breaker with the lights...i doubt your controller is powered by the same circuit but if it is make sure you add that in there to, hope this helps
 

NewClosetGrower

Well-Known Member
Wow great info. I had issues in my previous place where i would always trip the power. I know very litte regarding eletricity. I was running a veg and flower set uo in 1 room. 1 600w light and ballast, 1 4in exhaust and a few air pumps for flower and anyhwere between 8 and 12 43w cfl's. Now I understand the need to space out the load! Blew out my damn 42in flat screen from not having a surge protector :(
That sucks about your tv man! i had something similar happen to me when i was re wiring my game room last year...anyway, yeah thats a lot of lights to have on at once, plus everything else you had running in your room at the time...when something goes wrong with electricity the reason the breaker trips is because electricity finds the easiest travel path...and on every circuit in a home theres a ground wire running back to the panel. all the ground is there for is safety so theres never elec. on it unless somethings wrong...hence, something messes up, elec. takes the ground back home to trip the breaker because no other elec is on it...sounds kinda confusing i guess...but what im getting at is in your case...for that very moment in time the easiest path what the plug with your tv...
 

kingofqueen

Well-Known Member
awesome thread bro..i am a journeyman (licensed in commerical) electrician..so if you guys have ANY questions feel free to ask...wiring, overloading circuits, or anything of the sort...im more then willing to help
Thanks man ! There is no thread on saftey and with so many newbs throwing grows together I feel its nessesary to have a thread like this .
It doesn't get a lot of hits but its a nessesary thing hate to see someone burn their house down .
 

kingofqueen

Well-Known Member
I have 4 1000 watt lamps attached to this master controller, I have that wired to the main panel with 8 gauge outdoor-rated, stranded wire with a 50 amp breaker protecting it. Is the 50 amp to much as I still want to have the voltage protection close to the actual amps used. get my question?
Consider the lighting controller a subfeed. The controller it self should have its own overcurrent protection . IN this case you just need to protect the wire feedin the controller . You said #8 so a 50a breaker is perfect for this scenerio .

If your lighting controller doesn't have its own overcurrent protection you have to rate your breaker to protect the controller thus you would size your breaker based on 4k ,which is 16.66 amps at 240 v . Then you would need a 20 a breaker .
 
Top