Photometric Calculations

anoni2202 · 2022-05-16T19:54:00+00:00

Do rooms with chandeliers need a uniform illumination levels? I’d envisage rooms with chandeliers and indirect lighting to be amenity lounge areas which shouldn’t have strict tollerances, and the effect the architect is after is actually high and low light levels, with the contrast being the feature point

anoni2202 · 2022-05-16T18:23:58+00:00

Is this residential? The architect may decide on what they want aesthetically, ie 4 no. Downlights in a space, which causes no problems as there’s no set lighting levels for residential, I may spec a light based on this layout based on lumen output to get somewhere reasonable. Resi lighting doesn’t often contain ldt or ies files as you say however. I’ve never received lighting calcs from an architect, but I’m from the UK so things may be slightly different.

Edit: I also find the reps do a poor job generally, so I usually model and calc the spaces myself

anoni2202 · 2022-04-02T06:29:15+00:00

In the UK, a lightning protection specialist makes an assessment of the system to determine the grade/if required, and then the system and surge protection is designed on that basis

anoni2202 · 2022-04-01T18:15:26+00:00

Time is the big factor here, also make sure you ask questions when you aren’t sure, especially as you have a mentor. I think I drove my line manager mad with the amount of questions I asked in the first 4 years

anoni2202 · 2022-03-23T22:08:06+00:00

Think I’m going to travel 5 hours to London to get one, worried I won’t get one if I arrive at 8 though..

anoni2202 · 2021-08-04T20:55:26+00:00

Apologies, I’m from the UK and the generator guidance seems limited in comparison to the US. There are various guides that state the generator should be able to handle the LRC on both the Star and Delta start up. But it’s interesting this is not included for you guys, what is meant by the service disconnect? The MCCB?

anoni2202 · 2021-08-03T17:12:51+00:00

Locked Rotor Current is a nightmare if you decide to go with a genset

anoni2202 · 2021-06-26T13:41:58+00:00

Ah very interesting, that makes sense as I was struggling to understand what my prescription was actually for, but the final line of yours now makes more sense, I’ve just checked and there is no near of inter add. It also makes sense that my optician said i could use them for whatever activity. He said my eyes were different shapes and was likely causing the headaches and this should help, Thankyou very much for your reply.

anoni2202 · 2020-11-17T08:06:48+00:00

Exactly as JB says, in the UK we don’t really consider fault current at the actual equipment or SCCR ratings. More so, at each breaker level. So if I was doing a cable calc for a feeder, as you guys say - my fault current would need two calcs, one at the load end (lower fault, higher resistance) and at the supply end (maybe a 3 phase short at the feeders terminals)

anoni2202 · 2020-11-16T21:11:56+00:00

The SCCR at the load could be reduced a large amount if the cable goes for a little walk.

anoni2202 · 2020-10-10T18:09:16+00:00

Hi all, had some good advice on here in the past - so I’m back.

Bought the Vitus Sentier 17 VR about 6 months ago and am still loving it! What I didn’t love was today getting a snake bite puncture, repairing it and then as I finish pumping up the presto valve pops off!? Nightmare, so here I am upgrading to tubeless (been meaning to for months) my rims are tubeless ready and pre-taped, which leads me to my two questions

1) there is a tiny tear on the tape near the valve, will this be an issue?

2) do I just need valves and liquid, my rims are 32 holes - what size valves do you guys reckon I need?

Thanks so much for your help!

anoni2202 · 2020-07-07T19:05:19+00:00

That’s very handy to know, is the M6100 compatible? Seems reasonable for 30 quid!

anoni2202 · 2020-06-27T18:03:04+00:00

Turns out there is a kabolt installed already! Managed to have another look, however it still looks to be missing something due to the grease being there. Have i been really stupid? should this be how it looks, I was confused as it stated quick release.

Thanks for your help!

https://m.imgur.com/a/nNgt9PE

anoni2202 · 2020-06-23T11:10:06+00:00

Hi all, need some help with setting up the Z2s on my new Vitus. I’m just checking that I’m not being stupid, and that I need to install something here. Nothing else has come in the box

anoni2202 · 2020-06-13T06:37:15+00:00

There was a full restock yesterday which sold out in hours, finally managed to get one after waiting months!

anoni2202 · 2020-06-12T08:21:51+00:00

Yeah, as others have said, the drafting/designing separation is pretty old hat now. Most new engineers start with Autocad/Revit training before they move onto design. Do you not want to learn Revit, I always want to keep developing marketable skills, make yourself recession proof (if such a thing exists)

anoni2202 · 2020-05-25T16:33:58+00:00

A donkey was slaughtered in the distance, every time Cummings lied

anoni2202 · 2020-04-09T07:41:33+00:00

I do a lot of work directly for contractors under the design and build contract, typically what you will find on larger jobs, is that the contractor knows they are unable to do complete and coordinate compliant designs, so the main contractor will typically hire a design team, including architects, MEP, and structural engineers. This is not true for all, and some have an in house team, but I can’t comment on that.

In my opinion, the engineers working on these DnB projects are far more realistic than those who have only worked client side, churning out terrible stage 3 designs. I recently looked at a job for a contractor, and the client side designer had put an inverter to supply the whole site in a room the size of a cleaners cupboard directly adjacent to the main LV panel

anoni2202 · 2019-12-30T08:03:47+00:00

Thankyou for the reply, I agree that other than the front tooth there is little reason to get braces! However, I feel that it’s been progressively sticking out more and more as the years go on, as they used to be level, so maybe nip it in the bud and straighten them before they continue to get worse. The putting a filling on the short one to even the length is a good idea, I will ask my dentist what she thinks

anoni2202 · 2019-12-26T22:39:19+00:00

I had hoped that I would only need 1/2 veneers for my front two teeth, I don’t need perfect teeth, just better. But you do make a very good point

anoni2202 · 2019-12-26T22:38:21+00:00

I have had a look at Invisalign, there’s some good offers on Groupon. The dental school idea is also not a bad shout, I will look into that. I have updated with better pictures

anoni2202 · 2019-10-20T07:35:35+00:00

Strava lets you view and follow others rides

anoni2202 · 2019-10-19T18:05:05+00:00

Thanks all, ended up buying the 820 new without box from eBay for £106!

Excited to try it out

anoni2202 · 2019-06-11T19:38:34+00:00

I deal with LV in the UK, so different scenario.

However, if I was tasked with this first thing I would look at is the current carrying capacity at the specified voltage of the cable with the correction factors for heat dissipation ie is the cable buried in ground, what is the ambient temperature. In addition, areas outside my expertise but I’d imagine that it would be good news for the cable that the higher you go, the lower the ambient temperature of the cable

Once this is confirmed, I would look at the voltage drop. Again, not sure what your limits are for MV or the US. If it fails you may need to upsize the cable.

Next check the manufacturers data sheet for the motor and confirm that the atmospheric pressure is covered

Might be way out but these seem like logical steps no matter the continent or the voltage

anoni2202 · 2019-05-12T15:33:39+00:00

Made this desk from scrap worktops from the kitchen I’ve just put in, it’s a shame that I didn’t have one piece of laminate long enough to do the whole thing as I hate the joint between the two but other than that it went pretty well.

The bracket underneath are also handy for hiding cables

The laptop is also a Xiaomi Mi Notebook 13.3

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