OP
m25maintenance
im confused.com now. im not sure what u mean by start and end of cable. also every spark ngives a different answer to the cable size and how many amps the cooker will pull. bloddy hell
Discuss 3 phase help. in the Electrician Talk | All Countries area at ElectriciansForums.net
im confused.com now. im not sure what u mean by start and end of cable. also every spark ngives a different answer to the cable size and how many amps the cooker will pull. bloddy hell
lol
He was taking the pish mate !!
Ok, here is how it goes
20a Type c 3ph breaker, 6mm 4 or 5 core (+/-cpc), 45a rotary isolator, 6mm to oven use all SWA and use CW glands(ip rated)
Ill ask again, will there be a catering engineer there to commision as they are a sod !
thanks mate. i only av to supply up to the rotary switch.iv got 16mm cable 4 core ans seperate 16mm earth wire. we bought 16mm as we were gona put a 3 phase board as the owner also wanted a 3 phase chiller. so my cable is too big but who cares, im not paying 4 it. tanx. wat tests will i need to do on that install
thanks mate. i only av to supply up to the rotary switch.iv got 16mm cable 4 core ans seperate 16mm earth wire. we bought 16mm as we were gona put a 3 phase board as the owner also wanted a 3 phase chiller. so my cable is too big but who cares, im not paying 4 it. tanx. wat tests will i need to do on that install
R1+R2 and Ir mate, only IR to the rotary switch and im afraid you have absolutely no chance of getting 16mm 4 core terminated in the oven, i would buy a 3mtr length of 6mm for that!
I hate to keep asking but who is commisioning the oven ?? because these things need setting up by the installer on first power up, and involve all sorts of set up and calibration, i know on the far superior Rationals it takes about a hour and thats if you know what you are doing!
What size breaker do you have for this and what type is it??
Also the cable from rotary to oven will need to be 5 core as there is absolutely no way of terminateing a seperate earth to these ovens! having said that most ove these ovens are 3ph only and do not require Neuteral, if this is the case do away with the 16mm supp earth, and use the 4th core as cpc, again all of this needs confirming before arrival on site
seems ur all enjoying the funny answers but hey i dont care. we had to start at the begining. mate the company supplying the oven will do all work after the rotary switch. the company asked for a 3p and n supply.
U aint got a problem if u aint gotta connect the unit up!
Its a simple circuit then, and good news about the commisioning as its a nightmare!!
Make sure that you use a type c breaker as these things dont half pull on start up and as you are using massively oversized cable then make sure the breaker is the right size(20a) so you are de-rating the circuit
caus u origanally stated 3x33 amp supply and these little ovens are no where near that mate
ok but thats the info the oven supplier sent me. ill put the cable and rotary switch in and wait 4 more info
Check rating and condition of existing equipment including that of the distributor to confirm it is suitable for the additional load. Check adequacy of existing earthing and bonding arrangements, upgrade if not adequate.
Test R1+R2 of the new circuit, insulation resistance between all conductors, and confirm polarity.
Energise circuit, and immediately confirm polarity and verify phase sequence.
Measure Zdb at the distribution board for your circuit, add this to the R1R2 to calculate Zs.
At DB, measure PEFC. Measure PSSC and multiply this by square root of 3 to calculate prospective three phase fault current. Verify your breaker is adequately rated for this.
Verify voltage drop between origin of installation and the isolator you have installed with the load connected.
Complete and sign the Electrical Installation Certificate.
Reply to 3 phase help. in the Electrician Talk | All Countries area at ElectriciansForums.net
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