447 Power: Difference between revisions

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==Power General Notes:==
__NOTOC__
# Existing 230V/13A wall sockets should only be used for low-current equipment, not large items. The latter will have a separate supply
 
# New circuits will be installed with local distribution boxes so that there should never be a need to access the main electrical intake room (which belongs to the landlord, not us)
There are two sets of circuits now in use: the 'old' ones already installed when we arrived, and the 'new' ones which we have added. The former are all supplied via old-fashioned fuses installed in a fusebox in the (locked) power intake room and, except for the kitchen, do not have additional (ie RCD) protection. The new circuits are connected through local distribution boards ('Consumer Units') via a new main board, all using circuit breakers (MCBs) with RCD protection on most circuits. The status of all of the breakers can be seen without opening the units.
# Re safety emergency buttons (eg. [http://uk.rs-online.com/web/p/emergency-stop-push-buttons/3308559/ RS 330-8559]) they can be fitted ''per item of equipment'' or ''per room''. There is a strong argument that if someone away from the area where the emergency occurs runs to offer help they don't want to have to work out ''which'' kit is the problem, and that therefore the ''room'' power should be killed as a 'safety-first' issue. Latest discussions are that there will be a 'room' one external to the new workshop rooms, with some 'item' ones inside. Further comments welcome.
 
# Non-maintained emergency exit signs will be installed. Plans show possible locations. There are already emergency lights in place covering the whole floor which have been tested.
===Phase allocation===
# If in doubt, talk to [[User:AlisonW]]. If you need something special in your area, talk to [[User:AlisonW]]. If you think this is wrong, talk to [[User:AlisonW]]!
* We have a three-phase supply and need to keep our consumption on each phase roughly equal.  
* This means that different areas, even if adjacent, may be on different phases. '''Do NOT use extension leads from one area to feed equipment in another'''.
 
;Remember - NEVER CROSS THE STREAMS! ... er ... PHASES!


===Basement===
===Basement===
[[File:Basement elec.png|right|300px]]
[[File:Basement elec.png|right|300px]]
Existing lighting remains in situ, along with some wall sockets (mostly at main stairs end).  New circuits will be provisioned via new distribution boxes as follows:
Existing lighting remains in situ, along with some wall sockets (mostly at main stairs end).  New circuits will be provisioned via new distribution boxes as follows:
 
*'''Box A''': All power, except overhead lighting circuits, which is used in the wood workshop.
'''Box A''': All power, except overhead lighting circuits, which is used in the wood workshop. ([[User:Solexious]] is co-ordinating)
*'''Box B''': All power, except overhead lighting circuits, which is used in the 'dirty metal' workshop.
 
*'''Box C''': All power, except overhead lighting circuits, which is used in the biolab and wet room
'''Box B''': All power, except overhead lighting circuits, which is used in the metal workshop. ([[User:Solexious]] is co-ordinating)
*'''Box D''': Power circuits, except overhead lighting, for equipment in open workshop area.
 
*'''Box E''': possible 3-phase 16A power circuit. Not in current use,
'''Box C''': All power, except overhead lighting circuits, which is used in the biolab and wet room (darkroom). Biolab circuits per their request.
*'''Box F''': Power for server stack, future CNC workshop, and additional circuits.
;:sockets now not being fitted until Monday/Tuesday as biolab want to fill and paint everything first.
 
'''Box D''': Power circuits, except overhead lighting, for equipment in general workshop area. ([[User:Solexious]] co-ordinating)
 
'''Box E''': 3-phase 16A power circuit. Not in current use,
 
'''Box F''': Power for server stack, future CNC workshop, and additional circuits.
;:installation complete - 2x16A, 4x13A for server use, 4x13A for area use. Plenty of slots for more circuits.


===Ground Floor===
===Ground Floor===
[[File:Ground floor elec.png|right|300px|Partitions to be added]]
[[File:Ground floor elec.png|right|300px|Partitions to be added]]
This will be similar to downstairs in terms of getting the power to needed areas, though there are more socket points already in situ; New local distribution boxes are as follows:
This will be similar to downstairs in terms of getting the power to needed areas, though there are more socket points already in situ; New local distribution boxes are as follows:
*'''Box J''': Supplies sockets in electronics desks, entrance, social space and (part of) central area. Also supplies emergency exit lighting above stairs and at main entrance.'''Brown/Red/Phase 1'''
*'''Box K''': Supplies sockets and equipment in local area and circuit to sub-box '''K2''' supplying outside. '''Black/Blue/Phase 2'''
*'''Box L''': Supplies the two socket rings in the new classroom, plus corridor. Also supplies the emergency exit lighting at each end of corridor. '''Grey/Yellow/Phase 3'''
*Existing: mostly '''Brown/Red/Phase 1'''


'''Box J''': Supplies sockets in local work area and (part of) central area. Also supplies emergency exit lighting above stairs and at main entrance.
===Cable Colour Codes===
;:Box fitted on wall in position. Some 13A outlets to be added below before move date. Probably not final circuit layout
* Once upon a time the colour codes in the UK were ''black'' neutral, ''green'' earth, ''red'' live - phase 1, ''yellow'' and ''blue'' other two live phases when using a 3-phase supply.
 
Then along came "European Harmonization" and everything changed. In your home "''red-black-green''" became "''brown-blue-green/yellow''" and it wasn't too bad. But in the three-phase world the primary (and easily identifiable) red-yellow-blue became "''brown-grey-black''" which don't look much different in the semi-dark. Yes, black was now a *live* wire, not neutral. And yea, electricians up and down the land of the Angles got most distraught. Especially when they were laying steel-wire-armoured (swa) cables.
'''Box K''': Supplies sockets and equipment in local area (probably electronics lab) and circuit to sub-box supplying outside.
* At the London Hackspace we have a mix of old and new cables, used for a mix of purposes, because we try to reuse everything to reduce expenditure. This means that you must always '''check''' what a wire is being used for and NOT trust the original colour.
;:on hold pending decision on location due to shelving possibly requiring same place.
*Where the original colours are '''red-yellow-blue''' and it is now carrying single phase then '''red=live, blue=neutral, yellow=earth'''
;:box supplying outside waiting for clearance to put hole through (outside waterproof sockets ready to fit)
*Where the original colours are '''brown-black-grey''' and it is now carrying single phase then '''brown=live, black=neutral, grey=earth'''
 
Tape will usually be used at each end of the cable to correctly identify the use. These colourways are not necessarily a 'standard' but are easiest to work out as live and neutral always follow one old code and one new code, with the most obvious red/brown being live, and blue/black as neutral.
'''Box L''': Supplies the two socket rings in the new classroom, plus (part of) central area. May also supply emergency exit lighting at each end of corridor.
;:Was waiting on wall to be plastered or painted, now to be fitted Thursday pre-move
 
===Distribution details===
All sub-distribution boxes are supplied via 12mm^2 csa per core armoured or non-armoured cable, unless stated.
 
;Box A:
:[[User:Solexious]]
 
;Box B:
:[[User:Solexious]]
 
;Box C:
:Biolab circuits: 16 double sockets on three circuits, RCD-protected,
:Wet room: presently undefined: two MCB spaces reserved, all RCD-protected. One 6A lighting circuit.
::Total requirement: incomer, 2RCDs, 6 MCBs (6,32x3, 2blank) - 12 modules total - standard CU products can be used
;Box D:
:[[User:Solexious]]
 
;Box E:
:Termination only.
 
;Box F:
:Server: 2x 16A outlet, 1x double socket, RCD. sep circuits. (5 modules)
:CNC: presently undefined: 4 MCB spaces plus RCD reserved. (6 modules)
:one circuits for expansion (''room opp boiler entrance?'')
::Total requirement: incomer:3 MCBs (10,16x2, 8blank) - 14 modules total - standard CU products can be used
 
;Box J:
:'''partially on hold''' pending better definition of area requirements
:Emergency exit lights 6A
::Total requirement: incomer, 5 circuits with RCB - min 9 modules total - standard CU products can be used
 
;Box K:
:'''on hold''' pending better definition of area requirements. Will require one RCD for inside and one for outside, though latter may be local to exit with switch.
::Install 10-module CU as default; MCB choices can be revised subsequently.
 
;Box L:
:Classroom: 2 rings to extant fittings. RCD-protected
:Emergency Exit lights: 6A
: install 7-module CU, using twin+earth not armoured (due to routing required)


===Status Update===
===Queries===
====Wednesday April 11====
If you have any queries or want special provision for something, talk to [[User:AlisonW]].  
* Basement work outwith the workshop areas is completed to requirements for pre-move (see above)
* There was an accident made in the ordering made of the armoured cable which will be used to join the new distribution boxes back to the incoming power supply. This meant that the cable runs could not be started today as planned.
* We do have some armoured cable though and this - together with the refitting of the ceiling-mounted cable trays - should happen Thursday afternoon.
* Replacement cables have been ordered; it is ''hoped'' that they will arrive on Friday. Alison can't be at 447 on Friday so it isn't certain whether the connection(s) can be made pre-move, but is unlikely. She hopes to be here on Saturday evening (despite it being her birthday) but this isn't certain yet, especially as getting in the way of the move is not a good idea.
* Ground Floor work will be done Thursday afternoon.
* Biolab sockets will be fitted on Monday or Tuesday (pending dry paint) at their request
* I don't know when sockets will be fitted inside new classroom


== Works list ==
== Works list ==
*See [[447 Hackney Road /Power works list|Power works list]]
*See [[447 Hackney Road /Power works list|Power works list]]


== Metering ==
=== Metering ===
The power meter is one of these:
The power meter is one of these:
http://www.edmi-meters.com/ProductDetail.aspx?L0=1&Prodid=11
http://www.edmi-meters.com/ProductDetail.aspx?L0=1&Prodid=11
* [http://www.cyamon.com/ How DLMS works]
* [http://www.cyamon.com/ How DLMS works]
* [http://www.gurux.fi/index.php?q=DLMSCOSEMFAQ DLMS FAQ]
* [http://www.gurux.fi/index.php?q=DLMSCOSEMFAQ DLMS FAQ]

Revision as of 00:08, 3 May 2013


There are two sets of circuits now in use: the 'old' ones already installed when we arrived, and the 'new' ones which we have added. The former are all supplied via old-fashioned fuses installed in a fusebox in the (locked) power intake room and, except for the kitchen, do not have additional (ie RCD) protection. The new circuits are connected through local distribution boards ('Consumer Units') via a new main board, all using circuit breakers (MCBs) with RCD protection on most circuits. The status of all of the breakers can be seen without opening the units.

Phase allocation

  • We have a three-phase supply and need to keep our consumption on each phase roughly equal.
  • This means that different areas, even if adjacent, may be on different phases. Do NOT use extension leads from one area to feed equipment in another.
Remember - NEVER CROSS THE STREAMS! ... er ... PHASES!

Basement

Basement elec.png

Existing lighting remains in situ, along with some wall sockets (mostly at main stairs end). New circuits will be provisioned via new distribution boxes as follows:

  • Box A: All power, except overhead lighting circuits, which is used in the wood workshop.
  • Box B: All power, except overhead lighting circuits, which is used in the 'dirty metal' workshop.
  • Box C: All power, except overhead lighting circuits, which is used in the biolab and wet room
  • Box D: Power circuits, except overhead lighting, for equipment in open workshop area.
  • Box E: possible 3-phase 16A power circuit. Not in current use,
  • Box F: Power for server stack, future CNC workshop, and additional circuits.

Ground Floor

Partitions to be added

This will be similar to downstairs in terms of getting the power to needed areas, though there are more socket points already in situ; New local distribution boxes are as follows:

  • Box J: Supplies sockets in electronics desks, entrance, social space and (part of) central area. Also supplies emergency exit lighting above stairs and at main entrance.Brown/Red/Phase 1
  • Box K: Supplies sockets and equipment in local area and circuit to sub-box K2 supplying outside. Black/Blue/Phase 2
  • Box L: Supplies the two socket rings in the new classroom, plus corridor. Also supplies the emergency exit lighting at each end of corridor. Grey/Yellow/Phase 3
  • Existing: mostly Brown/Red/Phase 1

Cable Colour Codes

  • Once upon a time the colour codes in the UK were black neutral, green earth, red live - phase 1, yellow and blue other two live phases when using a 3-phase supply.

Then along came "European Harmonization" and everything changed. In your home "red-black-green" became "brown-blue-green/yellow" and it wasn't too bad. But in the three-phase world the primary (and easily identifiable) red-yellow-blue became "brown-grey-black" which don't look much different in the semi-dark. Yes, black was now a *live* wire, not neutral. And yea, electricians up and down the land of the Angles got most distraught. Especially when they were laying steel-wire-armoured (swa) cables.

  • At the London Hackspace we have a mix of old and new cables, used for a mix of purposes, because we try to reuse everything to reduce expenditure. This means that you must always check what a wire is being used for and NOT trust the original colour.
  • Where the original colours are red-yellow-blue and it is now carrying single phase then red=live, blue=neutral, yellow=earth
  • Where the original colours are brown-black-grey and it is now carrying single phase then brown=live, black=neutral, grey=earth

Tape will usually be used at each end of the cable to correctly identify the use. These colourways are not necessarily a 'standard' but are easiest to work out as live and neutral always follow one old code and one new code, with the most obvious red/brown being live, and blue/black as neutral.

Queries

If you have any queries or want special provision for something, talk to User:AlisonW.

Works list

Metering

The power meter is one of these: http://www.edmi-meters.com/ProductDetail.aspx?L0=1&Prodid=11

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