john87

I can tell you exactly what the problem is... You put the choke on, you grab hold of the saw, and, as you accidently touched the throttle, you just turned the choke off again.. 1. Put the choke on.. 2, Grab hold of the saw BY THE SIDE HANDLE. 3, Pull string till it fires ONCE.. [usually first pull] 4, Flick choke lever off.. [STILL HOLDING SAW BY SIDE HANDLE] 5, Pull string, Saw will start first pull and be on fast idle. NOW touch throttle and mechanism disengages and saw runs at normal idle speed.. Try it and see!!! john..

PLEASE PLEASE point out the bits that were "not very nice" or rude or insulting.. I think you will find that my comment was very polite, and, furthermore, was not aimed at any particular member in person, [unlike many of the comments i have read] so sorry, i will not be removing anything.. john..

Can i just point out, that REGARDLESS of one's opinion of the argument that JC would seek to advance, personal attacks merely serve to both demean the attacker, amd more importantly, demean the forum itself.. What conclusions would a visitor gain concerning the professionalism of the collective members of this forum, having read some of the comments posted?? If you cannot say anything nice, or at least express disagreement nicely, far better to say nothing at all.. john..

Is a 28" bar a bit much for a 62cc saw then?? john..

Ahh, i do not know... I know when you look at the catalogue the 620 apparently will pull a 28" bar, but for the 621 they say 24" and the figures say slightly less power too??? john..

Apparently the CS-621SX is the "low emissions" version. Whether this means it runs crap and will be hard to start i have no idea.. john..

As someone that has 60 acres of trees [and buildings] to remove this stuff from, i agree 100% john..

Well, i think it is perfectly correct what you are saying.. I know of LOADS of healthy trees covered with ivy right up the tops. Myself, i think it is a management issue, but like where the council cannot be arsed to maintain public parks so just bang in a sign saying "nature area" Problem is, all the halfwits cannot understand that what they term the "countryside" looks the way it does through management, not just being left to go wild as it were.. john..

Hi All, Thinking of getting a bigger saw. I can see that you all love the CS-620, but what about the latest version the CS-621SX??? Anyone got one?? john..

Exactly, I could go out and take photos of any number of healthy trees totally covered right up to their tops with ivy. Anyone that thinks it is not a problem or does not happen is an idiot.. I think it is a management problem as there are a large clump of trees not a mile from here that are in the middle of a loop of motorway slip road and so untouched. Every one, is covered to its full height.. john..

Hi All, Does anyone know if the two legs of an 8mm eye 2 eye will fit in between the cheeks of a DMM Pinto pulley?? What about a CAMP Sphinx pulley ???? john..

Urrrrr, them things are MINGING!!!!!! Why on earth would people want to buy termites??? john..

Perhaps they just caught me?? I know the standing charge for the three phase was a bit higher.. john..

Obviously it is possible wire things any way you like, but no way would anyone but a looney try to wire a 30 hp motor to start direct on line... You would not be able to buy a DOL starter that big anyway.. john..

What size welder what size lathe?? send me photos of nameplates on machines john..

Ok. there is a LOT more to it than that.. You see, you select the OCPD [overcurrent protection device [usually a circuit breaker] to suit the load. This is first step.. So, if you had a 60A load, you would select a 63A MCB Then you need to know what type.. They come with different "characteristics" you see, [their characteristic curve] These are "B" "C" and "D" Basically, this is how sensitive they are. If you tried to use a "B" curve with an inductive load like a transformer or motor it would almost certainly trip on startup, so you MIGHT be able to fit a "D" curve [which would be ok] Trouble is, you can only do this if the circuit "Zs" that is the "EFLI" [earth fault loop impedance] is low enough.. If it is not, in the event of a fault you will not meet the required "disconnection times" and so, not only would your circuit not comply with the wiring regs, but in the event of a fault, the wiring would be damaged by heat BEFORE the breaker operated [if it operated at all] AND, even worse, if the fault resulted in you receiving a shock, since the required disconnection times would not be met, the power might not be shut off at all, and you would be dead.. I have personally seen an air compressor [on a farm] where despite me telling the farmer that the circuit impedance was too high, i got ignored, and as a result, one day the motor failed to start and literally melted into a large lump of molten aluminium, without tripping the breaker at all.. john..

It does not work like that.. The DNO will ask you LOADS of questions along the lines of; What are you connecting up?? For EACH load they will want to know load in KVA [NOT kw] how long will each load be running a day, between what hours, what type of starter DOL or star/delta and how many stops and starts an hour. They will also want to know in particular about any single phase motors bigger than half horse power and any welders. They will want to know what lighting and what heating too.. Once they know all this, they will calculate IF they are prepared to offer you a supply [by no means certain] and what size supply they will give you.. It all revolves around what they think they can give you without affecting other consumers as they have a legal responsibility for the quality of power they supply.. 100A is the usual standard industrial supply size, it is an awful lot of power as it is 100A PER PHASE so the total power would be 400V x 1.732 [it is the square root of three, don't ask!!] x 100 = 69.3 KVA john..

Not by the time you include power factor and motor efficiency it is not.. More like 70 odd amp, then as you say, starting... john..

Think of one of them yellow tool transformers. You have 240 into the primary side. The secondary winding has the earth connected to the centre of it, so that the output is two lines [one from each end of the secondary winding], with 110V between them, [180 degrees apart, [think sine wave] and between either end of the winding and the earth that is connected to the centre of the winding, naturally enough, you get 55v. A split phase is the same but bigger. They run one single phase at 11,000v [from a three phase supply located elsewhere] into it and the output is 460V ac. Then all they have to do is to tap the centre of the secondary winding and earth "their" end and so you end up with two wires on the output with 460 between them [180 degrees apart, [think sine wave again]. You connect ONE of the wires to the neutral that is derived from the centre of the secondary and you get 230v. The neutral of ALL supplies, single to your house or three phase is earthed at "their end" This is why you do not get a shock when you touch the neutal, because, as it rises to 230v so does the ground you are standing on, so there is no "potential difference" and so no current flows.. Now, you can have a broken neutral in the supply system. This is VERY dangerous, as, in a TNCS system the earth is connected to the neutral too. So, as it is no longer earthed at "their" end, it will rise in voltage just as the "live" wire does. This means that if you touch it now, and you are earthed, you WILL receive a shock.. This is the reason that you have "bonding" with all conductive bits in an installation, whether parts of the installation itself [like metal enclosures] or external earthed parts, [like a metallic gas or water pipe] all connected together, so the voltage rises in them all at the same time. Therefore, once again, you will not recieve a shock i you touch one while in contact with another.. Now, under these fault conditions, you hold a "class one" appliance [say a metal cased electric drill] and you step outside the "equipotential zone" [go outside] and step onto your lawn say, and you WILL get a shock.. This is why sockets that are used for things that will be taken outside, MUST be fed from an RCD which will cut off the supply as soon as you touch the earth [and therefore get your shock] john..

Yes, i will have to look at options as they have just doubled the standing charge and the cost per unit has gone up an awful lot too.. john..

I have TWO supplies to the same property, a single phase one and a three phase one. The cost per unit is exactly the same. Supplier is SSE.. john..

Ok, 1, first off, No way will you drive a 30 hp anything from a single phase supply.. You might for a few seconds until the fuse went, as if you tried to drive a motor you would be pulling about 152 amps [once you allowed for PF and efficiency] and the voltage drop would be about 45 volts, so you would have anything from 208 volts to 171 volts left depending on the voltage of the incoming supply.. 2, A split phase 460 volt supply is two phases 180 degrees apart with a centre tapped neutral. So, between each phase and neutral, you have 230 volts, and between the two phases you have 460 volts across two phases 180 degrees apart. You say the inverter needs two 60 amp feeds, BUT what phase separation does it need [if any] ??? I would imagine that if it needs TWO feeds, then what is intended, is that it is powered between two phases of a three phase supply [lots of welders are like this] This would be two phases 120 degrees apart with a voltage of 400 between them. This is a mile away from 460 volts with 180 degrees of phase separation.. You might be able to adjust taps on the machinery to get it to run on 460 volts, but wht about the phase separation?? Think of it like this. Say on your car engine; What would happen if you managed to advance one cylinder 30 degrees and retard the next one 30 degrees. How do you think it would run?? Be VERY careful here before spending a lot of money.. Make absolutely sure you KNOW what the makers requirements are.. 3, People in pubs might tell you that a three phase supply cost fortunes, but this is generally bullshit from people that have never installed one. True, if you have to have a load of poles and a transformer installed, the cost will be very high. If the DNO have to replace an existing transformer, the cost depends on how many consumers will benefit from the replacement. If it is just you, you bear the full cost, it it were 50 people, then you would pay 1/50 of the cost.. 4, If there is already a three phase mains running past your property, AND if there is sufficient supply capacity that your installation will not affect other people's supply AND you are not going to install large motors or welders [in which case the DNO might decline to give you a supply at all] then the cost can be unbelievably cheap.. Have you asked the DNO for a price?? john..

Why not just have a proper 3 phase supply installed?? john..

There is a requirement by the HSE [or whoever] that when attaching cords, ropes, whatever to a carabiner that the knot binds down on the carabiner and cannot move about [thus preventing the carabiner being loaded in the wrong axis] john..

Since you all think it is such a good book, i have just bought a brand new copy of the actual book itself.. Was expensive, but all technical books are.. Think i will like it??? john