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Questions and electrical advice in the Commercial Electrical Advice - Discussions on Three Phase Supplies, three phase machinery and motors, DOL starters, phase sequence, running steel conduit, trunking and other questions on industrial and commercial electrical installations and maintenance. Commercial Electrical Talk. Also notice our Electrical Advice Forum and our Industrial Electrical Forum.

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Jim90
Unbalanced current in 3 phase
Hi guys, Just after a bit of clarity. After installing an energy logging device as per a client’s request we have highlighted that we have over...
2
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10
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2K
rapparee
rapparee
X
UK 3 Phase Motor Star/ Delta phase conversion
Hi Guys, We have a CNC router which uses single phase for the spindle, stepper motors and control box. This is all wired in and working...
2
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10
Views
1K
xpistos
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S
Tyre changer motor help
Hi guys new here and could do with picking a few brains if pos i have a tyre machine single phase with 0.75kw motor in it the lad who i got it of...
2 3 4
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38
Views
11K
Specialist
S
A
Typical Max. demand for a medium commercial premises?
I'm doing my 2396 design project, and would like some clues about typical commercial installations, and their maximum demand and incomers. Its a...
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3
Views
3K
netblindpaul
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M
Types of fuses for apartment
Hello, I bought an apartment and i want to add new dedicated circuits and also to change the fuses panel ( very very very old one). So i was...
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0
Views
1K
Mihai_dmg89
M
N
types of earthing to be carried out for 3 phase standby generator which is separately driven system
3 phase standby generator of rating 30KVA is to be install in the lightning prone area. The utility main line is TT arrangement where neutral...
Replies
1
Views
1K
davesparks
davesparks
R
Type of 3 Phase supply cable?
Hi, Iv found a 3 phase supply cable in the basement of a restaurant. It had been plastered over and I'm curious if this type of cable is legal...
2 3
Replies
20
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3K
Steve1412
S
DomB78
TYPE C RCBO Fails to trip on 1 Times RCD Test
Hi Can anyone help ? Recently fitted 2 separate Eaton 32a Type C RCBO, on the RCD test it fails to trip on the 1 times test and gives result as...
2
Replies
16
Views
5K
DomB78
DomB78
S
Two single phases through one isolator?
Morning guys, I'm new to this so bear with me! I have two 16a single phase machines that I want to supply with a single cable. I want to use one...
2 3
Replies
24
Views
13K
dwardy
D
D
Two post carlift single to three phase
Has anyone had any history of powering a three phase motor from a single phase supply? Is there a preferred/best way of doing this? i.e.single...
2
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15
Views
2K
diditrain
D
I
Two phases in one light switch... regulated against?
just completed an installation condition report on a commercial property... I've come across a situation where there are two phases present in...
2 3
Replies
28
Views
14K
Adam W
A
edexlab
two conductors into main isolator?
I've got a question regarding whether its acceptable or not to connect two different sized conductors (or even two equal sized) into the terminals...
Replies
3
Views
2K
edexlab
edexlab
L
Trying to modify a Generac GP3300 portable generator
I have a Generac GP3300 portable generator. It has 1 120/240 30amp RV receptacle and 4 120v 14amp standard receptacles. What I want to do is...
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8
Views
5K
Knobhead
K
W
Trunking vs tray
Hi lads/ladies After a recent post of mine, the lack of tray or trunking was highlighted on a bit of my work, i've taken this criticism fully on...
2 3 4 5 6 7
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67
Views
18K
Smudge
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T
Troubleshooting on a star delta starter
I've got a call about a pump that is not working. It was a 30 kw motor with a star delta starter. The motor start but before it changes to delta...
2
Replies
18
Views
6K
Pete999
Pete999
K
Tripping Patio Heater Circuit
Hi All, having an issue with what I thought would be a pretty straight forward problem at first if anyone can shed some light. This particular...
2
Replies
14
Views
7K
Kris_88
K
vxwestie
Tri-flex instead of solid tails
I've used 150, 185 and 240mm trip flex on large installs before contained in metal trunking. Is there any reason I can't use 35mm for a 100amp...
2
Replies
16
Views
6K
marc8
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G
tray work earth continuity, and cable ties?
I was on a fairly big new build commercial job recently, nowt too big electrically, but lots of SWA on tray all around the place by the main...
2
Replies
13
Views
3K
tazz
tazz
O
tray bonding
what do most do with tray to ensure its bonded, earth tags at each joint like on galv trunking or are the joins substantial enough, only ask as a...
2 3 4
Replies
36
Views
10K
Knobhead
K
B
Tray and basket bonding
Hi all Regarding bonding of cable tray and basket. Is basket required to be bonded if only data cables installed on it ? plus bonding cable tray...
2 3
Replies
28
Views
8K
pc1966
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