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My extinguishers are required by law to have 2 inspections a year here (as they are in a 'business' use)- but they have never been taken out of their brackets yet...- they walk up- look at the gauges, check the handle and pin are free and removable and fill out the paperwork and stamp the tag...

One thing to watch out for is with the dry powder ABC rated fire extinguishers, the contents can 'clump and solidify' over time and many manufacturers say to turn them upside down or rotate them on their side periodically (often as little as every three months) to prevent this from happening...

One thing many seem stuck on is 'has to come from the manufacturer'- grab a set of calipers (or even a ruler will do usually) measure the shaft diameter (yours appears to be a keyway pulley so add that fact to the shaft size) and the outer pulley dimension and look for V belt pulleys with those...

Thats because most of them started under compression (although not all did- we had a Lister 'single banger' diesel that was hand started- you hit the 'decompress' lever, spun it up to speed easily, then flipped the level back over and it fired every time- even a kid could do it... I've been...

Well it is something that designing high current inductors for inverters and such specifically warn against- how accurate (ie significant digits) is your tester??? (I am also wondering why the extra 13w in the total draw appeared??) with added resistance in the line causing a voltage drop at...

Hopefully this might show it a bit more clearly- a purely resistive load (top, labeled RO) has no phase shift, current and voltage remain in phase, where an inductive load (bottom diagram RL) has the current and voltage out of phase- with the same wattage being consumed with the load at both...

It can be dissipated as heat however (nothings 100% efficient) plus the phase angle change can make the apparent current appear higher if the voltage is lower at that point (total output wattage remains the same as demanded by the load)- meaning more heat generated because of the increased...

It however stores that energy and then releases it later in the phase angle...

Although this is talking about powerlines, inductive reactance can indeed cause conductors to heat up (powerlines have the issue of it causing them to 'droop' or sag) https://en.wikipedia.org/wiki/Electrical_reactance A coil is an inductor and a rolled up cable is indeed an inductive coil...

Optical smoke alarms should be regularly cleaned internally (those 'cans of compressed air' are perfect for the job) because they can (and do) build up dust and other contaminates on the lenses of the optical sensor- especially near cooking areas (not recommended) or if there are smokers in the...

Correct, that also makes a contributing factor- but the 'apparent resistance' from the inductance means it is more than a simple resistance measurement would indicate... (so say you measured the resistance and it calculated at say 100w dissipated in the cable, in fact you would get more than...

In fact, the Au/NZ electrical standards calculator accounts for the various possible ways a cable could be installed and figure that into the wire sizing needed for a run... https://www.jcalc.net/cable-sizing-calculator-as3008 Much easier than when I first started out- we had a 'book of...

Sorta right- it increases the APPARENT resistance (inductive reactance actually) as it is a 'loosely coupled coil' https://en.wikipedia.org/wiki/Electrical_reactance - look down towards the bottom for inductive reactance... The higher the current, the more the reactance- and the hotter it...

Newer installations (or updated consumer units on older installs) require a separate RCD on each circuit, rather than a single one on the entire house so thats not an issue with newer installs lol One thing that you should be aware of is the new lithium powered ones have a life expectancy of...

Sideways, I suspect that is part of the 'grey area' Spectric was talking about- many here in Australia used the same argument for years that 'if it can be unplugged, its not fixed wiring'- thats no longer the case here (and I suspect the UK may take the same path eventually) where fixed wiring...

As you might have gathered, I do have a little experience in the field ;-) And because it is something outside many peoples experience, they apply 'what normally works' not thinking that there are factors that make that experience useless- or even dangerous... That last 300m shed run for...

Although there are 'radio' ones out there- I'd stay clear of them- they tend to have rather short ranges (especially if going through multiple walls) the lower the signal, the harder they pull on the battery!!!- wired ones tend to be a LOT easier to set up (especially in attached buildings where...

Did you check to see if it would be usable for a 'proper' installation later??? (because it is a 'spur off a spur' and relatively long distance at that, you might have to go up a size from 'normal' to keep loop impedance within safe limits at the far end (ie you 'may' depending on the already...

In Australia- any wiring that is 'permanently fixed' is classified as 'permanent' (regardless of its wiring type originally) so an extension cord that is run in conduit- or even just nailed to the wall with clips is indeed classified as 'permanent' here and as our regs are heavily based on BS...

From the starting position of course.... Using the same example Your stepper motor etc starts from a known position (home position), advances so many steps to travel the 5mm (say 5000 steps)- drills a hole say, moves to 10mmm, drills another etc etc all the way to 20mm from the starting...